asthenopia

This is a fancy word for eye strain or discomfort. There are many causes for eye strain, including incorrect glasses, motility problems (the eyes out of alignment), or even from surface irritation such as dry eye.

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Dr. Timothy Root is a practicing ophthalmologist and cataract surgeon in Daytona Beach, Florida. His books, video lectures, and training resources can be found at:

2 COMMENTS

  1. I am a retired optical dispenser and ophthalmic assistant. Your site is by far the greatest ocular education site of the century. I thank you so much. You are gifted and an asset to the human race

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