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Gerull Labs LLC (G-Labs) Modern Vision Therapy resources for Apple iPad.


Description of the "Headline Retinal Rivalry" exercise in the Opto vision training app for iPad. A G-Labs collaboration with Tom Headline, COVT.

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Headline Retinal Rivalry

Developed exclusively for Opto. Available now for iPad! 


Headline Retinal Rivalry is a G-Labs collaboration with Tom Headline, COVT of Headline Vision Enterprises. This activity consists of targets with retinal rivalry progressing through a series of six flat fusion, luster, and stereoscopic images.

Required hardware: Stereoscope for iPad

How to Purchase: Available as an in-app purchase in Opto, the vision training app for iPad. Download Opto and find "Headline Retinal Rivalry" in the in-app library of exercises. Available as an individual exercise ($12.99 USD) or at a discounted rate as part of Expansion Bundle 2 ($69.99 USD).



Like all activities in Opto, a report is generated including the date and duration of the exercise. A patient assessment is also recorded if the user is signed into his/her personal profile.


Sample screenshots:


Download Opto for iPad to access the "Headline Retinal Rivalry" exercise.