OKN Strips 4+

Optokinetic Nystagmus Testing

Thomas Alvarez

Designed for iPad

    • $3.99



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
468 Ratings

468 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.

JohnKrunch ,

OKN strips

This works quite well. Tap the screen to make the strips go faster. Level 1 through 5. I’m using this app to treat my nerve/ muscle paralysis in my left eye. It was recommended by my therapist. This exercise and time and hope.

Developer Response ,

The strips should cycle through speeds by tapping on the screen. If you're having problems with that, please contact oknstrips@thomasalvarez.com so we can work with you to try and solve the problem. Thanks.

Breakersmoon ,


Great app! Has corrected my issue with left hand shaking.

App Privacy

The developer, Thomas Alvarez, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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