Understanding iPhone Eye Tracking and Accessibility
Activating eye tracking on your iPhone offers a powerful way to control your device using precise head movements, particularly beneficial for individuals with mobility impairments. This feature, integrated within Apple's robust accessibility suite, transforms how you interact with your iPhone by translating your gaze or head orientation into on-screen actions. Rather than relying solely on touch, you can navigate menus, select items, and perform gestures using subtle head motions, making your iPhone more accessible than ever before. This capability is not a standalone 'eye tracking' mode in the traditional sense of gaze-following, but rather a sophisticated implementation of 'Switch Control' that can be triggered and managed by head movements.
- Head movements control iPhone navigation via Switch Control.
- Accessibility settings house these advanced control options.
- Requires precise configuration for optimal performance.
- Offers an alternative input method for specific user needs.
Before you begin the setup process, it's crucial to understand that the iPhone doesn't have a dedicated 'eye tracking' sensor like some specialized assistive devices. Instead, it leverages its existing hardware, primarily the front-facing camera, to interpret head movements for control. This functionality is part of the broader 'Switch Control' feature, which is designed to allow users to interact with their device using external switches, or in this case, the camera to detect head positions. Therefore, when we discuss turning on eye tracking, we are referring to configuring Switch Control to respond to head movements as the input method. This is a nuanced distinction but vital for setting accurate expectations.
The primary goal of this accessibility feature is to provide comprehensive control for users who may have difficulty performing traditional touch gestures. By mapping head movements—such as looking left, right, up, or down—to specific actions or "switches," users can navigate their iPhone interface. This includes selecting icons, scrolling through content, and even activating custom gestures. The system requires careful calibration to ensure that your head movements are accurately translated into commands, minimizing accidental selections and ensuring fluid operation. Setting this up correctly is paramount for a positive and effective user experience, turning your head's natural motion into precise digital commands.
Core Principles of Head-Based Control
The underlying technology that enables head-based control on iPhone is primarily built upon the principles of assistive technology, specifically focusing on alternative input methods. When you enable this feature, your iPhone's front camera acts as a sensor. It doesn't 'see' your eyes or track your gaze directly, but rather detects the position and movement of your head within the frame. This data is then processed by the software to interpret your intended actions. Think of it as a sophisticated motion sensor system that uses your head's orientation as the cursor or pointer.
The system works by establishing a neutral position for your head. When your head moves away from this neutral point in predefined directions (e.g., tilting left, tilting right, moving up, moving down), the software registers these as 'switches.' These switches can then be assigned to specific actions within the iPhone's operating system, such as navigating to the next item, selecting an item, or returning to the home screen. The precision of this system relies heavily on the user's ability to maintain a relatively stable position and perform deliberate movements, which is why calibration is so important.
This approach democratizes device control, offering a powerful alternative for users who might otherwise struggle with standard touch interfaces. It's a testament to Apple's commitment to accessibility, ensuring that its devices are usable by the widest possible audience. By integrating these advanced control mechanisms into the iOS operating system, the company provides a built-in solution that doesn't require third-party hardware or software for basic head-based navigation. The ability to customize which movements trigger which actions is a key aspect of making this feature truly personal and effective for each user.
Prerequisites for Enabling Head-Based iPhone Control
Before diving into the settings to activate head-based control on your iPhone, ensuring you meet a few fundamental prerequisites will make the setup process smoother and more effective. The most critical prerequisite is having a compatible iPhone model. While Apple continuously updates its accessibility features, advanced camera-based controls like this are generally supported on models with a front-facing TrueDepth camera system, which is standard on most iPhones released from the iPhone X onwards. Always verify your specific iPhone model's compatibility with the latest iOS versions if you're unsure.
Secondly, you must be running a recent version of iOS. Apple frequently refines its accessibility features, introducing improvements and new functionalities with major iOS updates. To access the full range of options for head-based control and ensure optimal performance, it's recommended to update your iPhone to the latest available iOS version. You can check for updates by going to Settings > General > Software Update.
Beyond hardware and software, a stable environment is also key. Ensure your iPhone is adequately charged, or connected to a power source, as the front camera will be actively used during setup and operation, which can consume battery. A well-lit room is also beneficial for the camera to accurately detect head movements. While the system is designed to work in various lighting conditions, extreme darkness or very bright, direct light might interfere with its performance. Finally, ensure you have sufficient time for calibration, as this is not a feature you can set up in haste. Accurate calibration is the cornerstone of a functional head-based control system.
Checking Your iPhone Model and iOS Version
To confirm your iPhone model and iOS version, navigate to Settings > General > About. Here, you'll find 'Model Name' and 'Software Version.' This information is vital for checking compatibility with specific accessibility features, especially those relying on advanced camera hardware like the TrueDepth system. If your device is older or running a significantly outdated iOS, the options available might be limited or absent entirely. Apple's commitment to accessibility means features are often tied to newer hardware capabilities and software advancements.
Environmental Considerations for Setup
The environment in which you set up and use head-based control plays a significant role in its accuracy. A consistent lighting environment is ideal. Avoid direct sunlight shining on your face or screen, as this can cause glare and make it difficult for the camera to track your head position reliably. Similarly, very dim lighting can reduce the camera's ability to detect subtle movements. Ensure your face is clearly visible and unobstructed by hats, glasses that cause excessive glare, or other accessories that might obscure your head's position. A neutral background behind you can also help the system focus on your head rather than distractions.
Position yourself comfortably in a stable chair or seated position before starting. Your head should be naturally positioned, not tilted too far forward or backward, as this forms the baseline for all subsequent movements. Avoid slouching or leaning excessively, as this can lead to inconsistent tracking.
Step-by-Step: Activating Head-Based Control on iPhone
Activating head-based control on your iPhone is primarily done through the 'Switch Control' feature within the Accessibility settings. This process involves enabling Switch Control, configuring it to use the camera as a switch source, and then assigning specific head movements to control actions. It's a multi-stage process that requires attention to detail for optimal results. Follow these steps precisely to set up this powerful accessibility tool.
Enabling Switch Control
First, you need to enable the core Switch Control feature. This acts as the framework that allows alternative input methods to control your iPhone. You can access this by navigating through your iPhone’s Settings app. Once there, tap on ‘Accessibility,’ then scroll down to the ‘Physical and Motor’ section and select ‘Switch Control.’ Tap the toggle switch next to ‘Switch Control’ to turn it on. Your iPhone screen might briefly flash or display a new menu or icon, indicating that Switch Control is active.
Configuring the Camera as a Switch Source
With Switch Control active, the next crucial step is to configure your iPhone’s camera to detect and interpret your head movements. In the Switch Control menu, tap on ‘Switches.’ Here, you’ll see options for adding and configuring different types of switches. Tap on ‘Add New Switch.’ From the list of available switch sources, select ‘Camera.’ You will then be prompted to choose a direction for your head movement to act as the switch. Common choices include ‘Head Left,’ ‘Head Right,’ ‘Head Up,’ and ‘Head Down.’ Select one of these options to start.
Once you've selected a direction (e.g., ‘Head Left’), you will be asked to assign an action to that switch. For initial setup, it is highly recommended to assign the ‘Head Left’ or ‘Head Right’ movement to the ‘Next’ action. This action cycles through the items on your screen that can be interacted with. For instance, if you have icons on your Home Screen, selecting ‘Next’ will highlight each icon sequentially. Then, you can assign a different head movement (e.g., ‘Head Up’ or ‘Head Down’) to the ‘Select’ action, which will activate the highlighted item.
Assigning Head Movements to Actions
The power of head-based control comes from assigning specific head movements to desired actions. After setting up your first head-based switch (e.g., ‘Head Left’ for ‘Next’), you need to add more switches for other essential functions. Go back to ‘Add New Switch’ within the ‘Switches’ menu and repeat the process, selecting ‘Camera’ each time. Assign different head directions (e.g., ‘Head Right’) to other useful actions like ‘Select,’ ‘Home,’ ‘Control Center,’ or ‘Notification Center.’
For instance, a typical configuration might be: ‘Head Left’ = Next, ‘Head Right’ = Select, ‘Head Up’ = Home, ‘Head Down’ = Control Center. Experiment with these assignments to find a combination that feels intuitive and efficient for your workflow. The goal is to create a set of movements that allows you to navigate your entire iPhone interface without needing to touch the screen.
Calibration and Refinement
After assigning your initial head movements, you must calibrate them. Navigate to Settings > Accessibility > Switch Control > Recipes. If you haven't created a custom recipe, you can use the default ones or create your own. Crucially, within the Switch Control settings, find ‘Calibration’ or ‘Head Tracking Settings.’ Here, you can fine-tune how sensitive the camera is to your head movements and adjust the tracking area. This is where you define the neutral head position and the range of motion required to trigger a switch.
This calibration step is critical for ensuring accurate and responsive control. It involves moving your head through the intended range of motion while the iPhone records the data. You can adjust thresholds for how far your head needs to move and how long it needs to stay in position to register a command. Take your time here; precise calibration will prevent accidental selections and make the entire experience much more fluid and less frustrating. If you find that your iPhone isn't responding correctly, or it’s making selections unintentionally, returning to this calibration section is the first step in troubleshooting.
For smoother navigation, consider setting up a 'Head Tilt' or 'Head Nod' action as a 'Select' or 'Tap' gesture. This often feels more natural than assigning 'Select' to a side-to-side movement, especially if you're using 'Next' and 'Previous' for scanning through interface elements.
Customizing Your Head-Based Control Setup
Once you have the basic head-based control functionality set up, the real power lies in customization. Your iPhone allows you to tailor the experience precisely to your needs and preferences, making the interface more intuitive and efficient. This involves adjusting scanning methods, creating custom gestures, and fine-tuning the responsiveness of your head movements. Customization is key to moving beyond basic functionality and truly integrating head-based control into your daily iPhone usage.
Adjusting Scanning Methods
Switch Control offers different scanning methods, which dictate how your iPhone cycles through selectable items on the screen. The default is usually 'Automatic Scanning,' where items are highlighted automatically in sequence. You can change this to 'Manual Scanning' (where you explicitly trigger the scan) or 'Rhythm Scanning' (which uses a repeating pattern). For head-based control, 'Automatic Scanning' is often preferred, but understanding the options allows for fine-tuning. Within the Switch Control settings, go to ‘Scanning’ and explore ‘Auto-Scanning Time’ to adjust how quickly items highlight.
A particularly useful setting under ‘Scanning’ is ‘Item Hopping.’ When enabled, it allows you to use multiple head movements to skip over items you don't want to select. For example, you might set ‘Head Left’ to ‘Next Item’ and ‘Head Right’ to ‘Next Item Group.’ This allows you to quickly move between different sections of the screen (like between icons and a dock) without cycling through every single element. Experiment with these settings to find a scanning rhythm that feels natural and efficient for your typical usage patterns.
Creating Custom Gestures
Beyond standard actions like ‘Select’ or ‘Home,’ you can create custom gestures that mimic specific multi-touch actions, such as pinch-to-zoom, a two-finger swipe, or a specific app gesture. In the Switch Control menu, tap on ‘Create New Gesture.’ You’ll be presented with a blank screen where you can perform the desired gesture using your finger as you normally would. Once recorded, you can assign this custom gesture to one of your head-based switches. This is incredibly powerful for interacting with apps that rely heavily on complex touch inputs.
For instance, if you frequently use pinch-to-zoom in photos or maps, you can record this gesture once and then assign it to a specific head movement, like ‘Head Up’ or ‘Head Down’ if those aren't already in use for other primary functions. This significantly expands the range of actions you can perform using only head movements, making your iPhone capable of handling tasks that might otherwise be difficult or impossible.
Fine-Tuning Head Tracking Sensitivity and Range
The ‘Head Tracking’ settings are paramount for a responsive and accurate experience. Within Switch Control, navigate to ‘Head Tracking.’ Here, you can adjust the ‘Tracking Speed,’ which controls how quickly the cursor or highlight moves across the screen in response to your head movements. A slower speed offers more precision for selecting small targets, while a faster speed allows for quicker navigation across the screen. You can also adjust the ‘Movement Tolerance’ or ‘Dead Zone,’ which defines how much your head must move before it’s registered as an input, helping to prevent accidental triggers from minor, involuntary movements.
Additionally, you can redefine the ‘Head Position’ settings. This allows you to set your current head position as the neutral point. If you find yourself consistently needing to tilt your head in a certain way to keep the cursor centered, you can recalibrate the neutral position. This ensures the system adapts to your posture and comfort, rather than forcing you into an unnatural position. The ability to adjust these parameters means you can optimize the head-tracking experience for your unique physical setup and preferences.
If you find that your head movements are too sensitive and trigger actions unintentionally, try increasing the ‘Movement Tolerance’ or ‘Dead Zone’ in the Head Tracking settings. This creates a small buffer zone around your neutral position that won't register as an input.
Using Your iPhone with Head-Based Control
Operating your iPhone with head-based control transforms your interaction model. Instead of tapping icons, you'll be guiding a cursor or scanner to the desired element and then executing a command. This requires a shift in thinking from direct manipulation to indirect control, but with practice, it becomes remarkably efficient. The key is to understand the flow of interaction and how your configured switches translate into on-screen actions.
Navigating the Interface
When Switch Control is active and configured for head-based input, you’ll typically see a cursor or an outline that moves across the screen following your head movements. If you’ve assigned ‘Head Left’ to ‘Next’ and ‘Head Right’ to ‘Select,’ you would move your head left to highlight different icons, buttons, or menu items. Once the desired item is highlighted, you would then move your head in the direction assigned to ‘Select’ (e.g., ‘Head Right’) to activate it. This process is repeated for all interactions, from opening apps to typing messages.
For scrolling, you can assign a head movement to the ‘Scroll Up,’ ‘Scroll Down,’ ‘Scroll Left,’ or ‘Scroll Right’ actions. For example, tilting your head up might initiate scrolling through a webpage or document. Alternatively, you can use the ‘Next’ action to cycle through to the scroll bars themselves and then use ‘Select’ to activate them for directional scrolling.
Typing on the iPhone Keyboard
Typing using head-based control presents a unique challenge, but it's manageable with the right configuration. The on-screen keyboard will appear, and each key will become selectable. Using your ‘Next’ and ‘Select’ head movements, you can navigate through the keys. First, use your ‘Next’ movement to cycle through the keys until the desired letter is highlighted. Then, use your ‘Select’ movement to "press" the key. For faster typing, explore the ‘Item Hopping’ feature mentioned earlier, which can allow you to skip entire rows or sections of keys.
Alternatively, you can configure a custom gesture for common typing patterns or assign a specific head movement to the ‘Tap’ action if you have one available. Some users find it beneficial to set up a gesture that mimics a double-tap for specific input fields. If you find typing too slow, consider using Dictation (available through Siri by tapping the microphone icon on the keyboard) as a more efficient alternative for composing text.
Interacting with Apps and Content
Interacting with apps is largely the same process: navigate to the element you want to interact with using your ‘Next’ switch, and then activate it using your ‘Select’ switch. For apps that utilize gestures, the custom gestures you've created become invaluable. For example, in a photo editing app, you might have a custom gesture for a pinch-to-zoom or a rotate action. You can also assign actions like ‘App Switcher’ or ‘Control Center’ to specific head movements, allowing you to quickly switch between apps or access system controls without needing to exit your current application.
For media playback, you can assign head movements to ‘Play/Pause,’ ‘Skip Forward,’ and ‘Volume Up/Down’ controls. This makes managing music, videos, and podcasts seamless. The ability to customize actions means you can tailor the controls to the apps you use most frequently, making your iPhone a highly personalized and controllable device. It’s about building a functional system of head movements that aligns with your common tasks.
Keep a list of your assigned head movements and their corresponding actions handy, especially during the initial learning phase. This reference can significantly speed up your adaptation to the new control scheme.
Verification and Testing Your Setup
Once you have completed the initial setup and customization of your head-based control system on your iPhone, thorough verification and testing are essential. This stage ensures that your configurations are functioning as intended, that the responsiveness is adequate, and that the system is reliable for daily use. It’s about confirming that the complex setup translates into a practical, usable interface.
Basic Functional Checks
Begin with simple, fundamental checks. Navigate to your iPhone’s Home Screen. Use your ‘Next’ head movement to cycle through the icons. Confirm that each icon is highlighted sequentially and that the cursor moves smoothly. Then, use your ‘Select’ head movement to open an app. Once inside an app, test basic navigation. For instance, in Safari, use your ‘Next’ and ‘Select’ movements to navigate links or buttons. Test scrolling by using your designated scroll action or by navigating to the scroll bar and selecting it.
If you’ve configured a ‘Home’ button action, test it from within an app to ensure it returns you to the Home Screen correctly. Test the ‘Control Center’ and ‘Notification Center’ if you’ve assigned them to specific head movements. These basic checks confirm that the core switching and navigation mechanisms are operational and responsive to your head movements.
Testing Custom Gestures and Actions
Next, focus on the custom configurations you’ve implemented. If you created a ‘pinch-to-zoom’ gesture, open an app like Photos or Maps, bring an image or map into view, and then trigger your custom zoom gesture using the assigned head movement. Verify that the zoom functionality works as expected. Test any other custom actions you’ve assigned, such as specific app shortcuts or multi-finger swipes, to ensure they perform the intended function within the relevant apps.
If you have assigned specific media controls (play/pause, volume), open a music or video app and test these functions. This ensures that your customized controls integrate correctly with other applications and system features. The goal is to confirm that every configured input translates into the desired output, making your iPhone a fully controllable device through your head movements.
Assessing Responsiveness and Accuracy
Beyond just confirming that actions trigger, it’s vital to assess the responsiveness and accuracy of the system. Does the cursor lag behind your head movements? Are selections made too quickly, leading to errors, or too slowly, causing frustration? This is where fine-tuning becomes critical. If the system feels sluggish, revisit the ‘Tracking Speed’ in the Head Tracking settings and consider increasing it. If it’s too sensitive and making unintended selections, increase the ‘Movement Tolerance’ or adjust the calibration. The goal is to find a balance where the system reacts promptly to deliberate movements but ignores minor, involuntary ones.
Pay attention to how consistently the system registers your intended movements. If you find yourself constantly having to recalibrate or adjust your head position, there might be an issue with the lighting conditions, your setup, or the specific calibration profile. Spend time in the ‘Calibration’ section of the Head Tracking settings, re-establishing your neutral position and ensuring the system accurately maps your range of motion. Achieving a smooth, reliable, and accurate control experience is the ultimate goal of this verification process.
Record a short video of yourself using the head-based control system. Reviewing this video can help you identify patterns of error or hesitation that you might not notice in real-time, aiding in your troubleshooting and refinement process.
Troubleshooting Common Issues with Head Tracking
Even with meticulous setup, you might encounter issues with head-based control on your iPhone. The system relies on precise interpretation of subtle movements, and various factors can interfere with its accuracy and responsiveness. Fortunately, most common problems have straightforward solutions that involve adjusting settings, environmental factors, or your usage habits.
Cursor Not Moving or Moving Erratically
If the cursor on your screen is not moving at all, or if it's jumping around erratically, the first step is to check your environment. Ensure the front camera is clean and unobstructed. Check that the lighting conditions are adequate – not too dark, not too bright with direct glare. Sometimes, wearing new glasses or a hat that significantly alters your head profile can confuse the system. Try removing these accessories temporarily to see if performance improves.
Within the settings, revisit the ‘Head Tracking’ section. Ensure that ‘Head Tracking’ is actually enabled. Check the ‘Tracking Speed’ and ‘Movement Tolerance.’ If the tolerance is set too high, it might ignore small, deliberate movements. If it’s too low, it might interpret slight shifts as erratic movements. Recalibrating your head position by going to Settings > Accessibility > Switch Control > Head Tracking > Head Position and selecting ‘Set Head Position’ can often resolve erratic movement issues by re-establishing a stable baseline.
Accidental Selections or Missed Inputs
Accidental selections typically occur when the ‘Movement Tolerance’ is too low, or when the ‘Select’ action is triggered too easily. If you’re unintentionally activating items, increase the ‘Movement Tolerance’ in the Head Tracking settings. You can also adjust the ‘Auto-Scanning Time’ in the Scanning settings to give yourself more time to move the cursor to the desired item before it automatically selects or moves to the next item.
Conversely, if you find your intended selections are being missed, the ‘Movement Tolerance’ might be too high, or the ‘Tracking Speed’ too slow for your deliberate movements. You may need to decrease the tolerance or increase the speed. Also, ensure that the head movement you’ve assigned to ‘Select’ is distinct and requires a more deliberate motion than your ‘Next’ or ‘Scan’ movements to avoid confusion.
Difficulty Navigating Specific Apps or Menus
Some apps or complex menus might present challenges due to their layout or reliance on specific gestures. If navigation is difficult, review your scanning method. Perhaps ‘Item Hopping’ needs to be enabled or configured differently to move between groups of items more effectively. For apps that require specific gestures, ensure you have created and assigned custom gestures for those actions. If an app is consistently problematic, consider if there's a more accessible alternative or if using Dictation for text input would be more efficient.
It’s also worth noting that not all UI elements are equally accessible. While iOS is designed with accessibility in mind, third-party apps may not always implement accessibility features optimally. If you encounter persistent difficulties in a particular app, check if there are any app-specific accessibility settings or consider providing feedback to the app developer.
Switch Control Not Activating or Disappearing
If Switch Control seems to deactivate unexpectedly, or if the cursor and control menu disappear, first ensure that you haven't accidentally turned it off. You can add ‘Switch Control’ as a shortcut accessible via the Accessibility Shortcut (triple-clicking the side button or Home button, depending on your model) for quick activation. If the Switch Control interface itself is missing, it likely means Switch Control has been turned off in the settings. Re-enable it and ensure any custom recipes or settings are saved.
If the camera is not being recognized as a switch source, retrace the steps for configuring the camera switch. Ensure you selected ‘Camera’ as the switch source and assigned a direction. Sometimes, a software glitch can occur; restarting your iPhone can resolve temporary issues with the Switch Control system or camera recognition. Ensure your iOS is up-to-date, as updates often include bug fixes for accessibility features.
If you're struggling to find the right balance in calibration settings, try resetting all Switch Control settings to their defaults and then re-apply your desired configurations. This can help clear any conflicting or improperly applied adjustments.
Beyond Head Tracking: Other iPhone Accessibility Options
While head-based control, often referred to as eye tracking on iPhone, is a powerful feature, it’s part of a much larger suite of accessibility tools available. Apple’s commitment to making its devices usable for everyone means there are numerous other options that can assist users with different needs, often complementing or providing alternatives to head tracking.
Voice Control and Siri
For users who can speak, Voice Control offers an even more direct way to command their iPhone using spoken words. It allows you to perform nearly any task using voice commands, including navigating, tapping, swiping, and dictating text. Unlike Siri, which responds to specific commands, Voice Control listens for a broader range of natural language instructions and can be customized extensively. If head tracking proves too cumbersome for certain tasks, or if you have difficulty with precise head movements, Voice Control might be a more suitable or complementary option.
Siri, Apple's intelligent assistant, also plays a vital role. While not a direct control method in the same vein as Switch Control, Siri can perform a vast array of tasks via voice commands, such as making calls, sending messages, setting reminders, opening apps, and controlling smart home devices. Integrating Siri commands can streamline many daily interactions, reducing the need for manual input altogether.
AssistiveTouch and Touch Accommodations
AssistiveTouch is another cornerstone accessibility feature. It provides a virtual menu button that floats on your screen, offering quick access to system functions like Home, Siri, Device controls, and custom gestures. This can be particularly helpful for users who have difficulty performing precise touch gestures or reaching certain areas of the screen. You can customize the top-level menu of AssistiveTouch to include your most frequently used actions or even specific custom gestures, making it an efficient on-screen control center.
Touch Accommodations, found within the Accessibility settings, allows you to fine-tune how your iPhone responds to touch input. You can adjust the hold duration (how long you need to touch the screen before an action is registered), ignore repeated touches, and change how touch gestures are interpreted. These settings can be invaluable for users who have tremors or unintentional repeated touches, helping to prevent accidental actions and improve the reliability of touch interactions.
Magnifier and Display Accommodations
For users with visual impairments, features like Magnifier and various Display Accommodations can significantly improve usability. Magnifier uses your iPhone’s camera to zoom in on objects, text, or anything else you point your camera at, acting as a digital magnifying glass. It includes features like brightness and contrast controls, and even flashlight functionality, to make reading easier.
Display Accommodations include options like ‘Invert Colors,’ ‘Color Filters’ (for color blindness or visual sensitivities), and ‘Reduce Motion.’ You can also adjust text size, bold text, and increase contrast. These features help make the visual interface more comfortable and legible, reducing eye strain and improving comprehension for a wide range of visual needs. Together, these tools ensure that the iPhone remains a versatile and accessible device for diverse user requirements.
Frequently Asked Questions About iPhone Eye Tracking
The true power of iPhone accessibility lies not just in enabling features, but in tailoring them to create a seamless, personal interaction model.
The concept of 'eye tracking' on iPhone is most accurately understood through the lens of Switch Control and head-based input. This section addresses common queries about how this functionality works and how to use it effectively.