3 Topic Commentaries

Spherical-equivalent contacts may shift binocular function

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  Johannes Burge, PhD

  Sensation and Perception; Vision Science

  •

  University of Pennsylvania

  Imagine you’re riding in a car, pulling up to an intersection. A cyclist in cross-traffic is going by at 15 miles per hour. If you calculate it out, the misperception of depth will be about nine feet. That’s a big deal—that’s the width of a traffic lane.

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• 

  Kathryn Hatch, MD

  Ophthalmology

  •

  Harvard Medical School

  This is why doctors often first fit patients with monovision contact lenses to see how they tolerate it.

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• 

  Meghan Berkenstock, MD

  Ophthalmology; Uveitis

  •

  Johns Hopkins Medicine (Wilmer Eye Institute)

  The earlier you get LASIK or PRK the longer the effect will last because when we hit around age 40 to 45 we all start to need reading glasses unless we're nearsighted to begin with or some people choose for touch up in order to have one eye near and one eye far called monovision usually you don't need to touch up unless maybe things are just slightly blurry after you have it done and then you get rid of any residual astigmatism or any prescription that you might need.

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