Top selling diagnostic and therapeutic app for iPad, iPhone and iPod Touch!

OKN Strips can be used to elicit Optokinetic Nystagmus (OKN) for evaluation of neurological, otological or opthalmological disorders, includes a Red Desaturation mode and now has an Amsler grid for additional eye testing.

OKN Strips:
Tap the screen to cycle through speeds of the moving strips. Tap the strips icon in the bottom toolbar to toggle the color of the strips between Red and Black. Pinch or Zoom with two fingers to change the width of the strips. Swipe against the direction the strips are moving to reverse their direction. Tap the screen with two fingers to hide or show the bottom toolbar.

On the right side of the bottom toolbar there's icons to open the Red Desaturation and Amsler Grid.

Red Desaturation:
Use the colored circle to perform a red desaturation test.

Amsler Grid:
Use the Amsler grid to perform eye tests. The buttons on the bottom toolbar change color combinations of the grid.

What’s New

Version 2.1

Dark Mode Support
iOS 13 Support and Fixes

Ratings and Reviews

4.6 out of 5
298 Ratings

298 Ratings

kalsajja ,


Good app.. The only complain ill make is after opening the OKN strips if i need to go back to the menu containing amsler grid , i can only do so after i quit and close the application and open it again.. But its a minor complaint and i like the app.

Hgfrdhohrfdsdh ,


It'a very good but I think that a black and white strips option on OKN would be awesome.
Update: my bad there is this option , sorry

SpaceSnaxxx ,

Good app

Red-Black inversion doesn't work on grid test but otherwise a good app. You can get back to main menu from optokinetic by holding down on screen for two seconds and the back menu appears.


Thomas Alvarez
7.2 MB

Requires iOS 12.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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