Copyright 2017 - Refraction/Retinoscopy Simulator

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Lessons and software by Todd Zarwell, OD, FAAO

Purchase online access and learn how to refract and perform retinoscopy on the best simulator available. Included in your membership ($79 for lifetime access) are 16 lessons covering both plus and minus cylinder phoropters. 

  • Learn to refract on over 100 virtual patient scenarios.
  • Sharpen your skills with clinical scenarios.
  • Practice with PLUS or MINUS cylinder photoropters.
  • Refine your retinoscopy skills.
  • This is the best virtual simulator available.

Purchase here.

Dr. Todd Zarwell is board certified in Optometry by the American Board of Optometry and is a fellow of the American Academy of Optometry. He is a 1994 graduate of Ripon College and a 1999 graduate of the Illinois College of Optometry. In addition to clinical practice, Dr. Zarwell has spent his career developing software, online utilities, and mobile apps for eye care providers. He is currently the Director of Practice Facing Technologies for RevolutionEHR.  In his free time, Dr. Zarwell enjoys biking, CrossFit, painting and, most of all, spending time with his wife and three boys.






Q. Will this software work on both PC and MAC?

A. The software is online and will work on both PC and MAC. All you need is a web browser with FLASH enabled.


Q. I cannot view the videos or use the simulator, what is wrong?

A. You need a Flash-enabled browser. Make sure your browser has the latest version of Adobe Flash installed. After installing, go to this page to make sure your Flash is enabled for your web browser:

Click on the links and follow the directions if you see the following message: Adobe Flash Player is already installed, but disabled. Click here for more information.


Q. May I use this software on multiple computers?

A. The software license is for one person. If you need a license for multiple people, then please contact us.