1: Contrast Sensitivity
The first game mode/test in the OKKO Health app measures contrast sensitivity. Moving dots in different shades of grey will appear on the screen, and the aim is to tap the ones you can see.
Some dots are more difficult to see than others. The purpose of this is to carefully test your ability to see different levels of contrast.
Higher contrast sensitivity scores indicate better performance
The second game mode/test measures something called ‘Near Visual Acuity’. This is a similar test to the more traditional eye/letter chart, typically used when visiting an optician. But instead of looking at letters, we want you to look for vanishing 'optotypes' - we call these 'OKKO Circles'.
Circles in various sizes will appear on the screen, and the aim is for you to tap all the circles you can see. The smaller the circle gets, the harder they are to see.
The app will adjust the size of the circles based on your performance. The better you do, the smaller the circles get, making it more challenging find.
Acuity is measured in something called 'LogMAR'. The lower the LogMAR score, the better the performance.
The third game mode/test measures your ability to see minor misalignment. This test is particularly looking for the degree of distortion/blind spots within the patient's vision.
Dots in a circle appears on the screen, one of which is slightly misaligned (outside of the circle). The aim is for the patient to tap the dot that they think is outside of the circle. The misalignment become less noticeable as the test goes on, making it more difficult to identify. If the patient is struggling, the dot will slowly start moving further out from the circle.
The app will adjust the misalignment based on your performance. The better you do, the smaller the misalignment gets, making it more challenging to find.
Hyperacuity is measured in reaction time.