Detecting a visual indicator of an occluder for an eye examination

A handheld computing device, comprising:

• a front facing built-in camera oriented in a first direction;
• a display screen oriented in the first direction;
• a memory;
• and
• a processor configured to execute instructions stored in the memory to:
• determine a distance between the display screen and a user of the handheld computing device;
• determine, via the front facing built-in camera, an eye of the user covered by an occluder;
• detect, via the front facing built-in camera, a visual indicator located on the occluder while the occluder is covering at least a portion of a user's face;
• configure a graphical user interface (GUI) to display, via the display screen, an eye examination to the user;
• and
• output, via the display screen, a result of the eye examination based on information encoded by the visual indicator.

A non-transitory computer readable medium storing instructions operable to cause one or more processors to perform operations comprising:

• detecting, via a camera of a device of a user, a visual indicator located on an occluder while the occluder is covering at least a portion of a user's face;
• configuring a graphical user interface (GUI) to display, at a display screen of the device, an eye examination administered to the user;
• and
• outputting, via the device, a result of the eye examination based on information encoded by the visual indicator.