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


About Us

Learn more about the G-Labs (Gerull Labs LLC) team of co-founders and the story behind our company.

Our story story begins in Boulder, Colorado USA when our Founder, Doug Gerull, was referred to a vision therapy clinic for help with a persistent double vision problem. 

Doug attended the clinic once a week and was also given exercises to perform at home between clinic visits.  Most often these exercises were done with old, well-established paper tools, including instructions and physical aids that were not all that easy to use. As his vision therapy progressed, the aids given to Doug caused him to recall his early career experience with stereo optics and image analysis. He started thinking about how great it would be if we could update the therapy tools with a tablet now that the screen resolutions are so awesome. As a technology enthusiast, Doug was excited for the opportunity to have fun with both 3D design and app building at the same time.

Click to watch the video about our story. This video was made when we were selected as finalists in Mobile Future's "The Mobileys" awards.

From that creative spark, Doug proceeded to design a stereoscope that could easily attach to the iPad. Not only that, but also to create an app that could duplicate a wide variety of exercise outcomes currently accomplished with paper.

Doug then began to assemble the G-Labs team including his daughters, a computer scientist/game developer and a graphic designer, who helped him build the app that would grow to include a large library of vision therapy exercises. As our plans progressed, Doug showed the stereoscope and app prototypes to his vision therapy specialist who soon joined G-Labs as our Senior Research Optometrist. With our team of co-founders complete, Gerull Labs LLC (G-Labs for short) was officially formed with the goal of making vision therapy more engaging, mobile, and effective of both children and adults. 

The G-Labs Team

Douglas Gerull

Douglas Gerull is the Founder of G-Labs. Inspired by his own vision therapy experience, Doug began to think about opportunities to apply new technologies to established clinic practices. Doug's career includes deep software experience at Intergraph, precision optics and mechanics at Carl Zeiss, and spacecraft systems as a co-founder of DigitalGlobe. Those experiences and a love for technologies such as 3D printing led him to create G-Labs together with with the talents of his co-founders. 

Jennifer Gerull-Knock

Jennifer Gerull-Knock is the Chief Operating Officer and a co-founder of G-Labs. She completed a B.Sc. in Computer Science from the University of Colorado and went on to work in Releasing Engineering and Production on large scale on-line video games including EverQuest II, Star Wars Galaxies, and DC Universe Online. 




Rebecca Gerull is the Graphic Arts Director and a co-founder of G-Labs. Utilizing her extensive training in a wide variety of artistic mediums, including graphic design, Rebecca creates compelling and clinically effective imagery for our exercises, user interface, and marketing materials.



 Jennifer S. Simonson, OD, FCOVD is the Senior Research Optometrist and a co-founder of G-Labs and is in private practice at the Boulder Valley Vision Therapy center.  She is a graduate of the Ohio State University College of Optometry and a Fellow of the College of Optometrists in Vision Development.  Dr. Simonson was the recipient of the 2007 Colorado Young Optometrist of the Year. Her primary interests in practice include pediatric vision care, vision therapy, sports therapy, and vision rehabilitation.