A member asked:

Is there a the difference between eye fatigue and failing eyesight?

4 doctors weighed in across 2 answers

Yes: Eye fatigue is due to overexertion of eye muscles, also termed asthenopia. Relaxation will help. Failing eyesight is more likely more permanent and may be due to refractive errors, cataract, glaucoma or macular degeneration.

Answered 12/31/2014

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Yes: Eye fatigue occurs when you are tired or your eyes have been "overworked". After long hours reading or working up close, the eyes may become dry and irritated. Failing eyesight implies that the eyes are no longer working as well as they should be or used to. It is important to see an eye doctor who can determine the cause of failing eyesight.

Answered 11/6/2011

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