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> couldn't even go outside without his glasses

Yep. The term for this is 'dayblind'. My sister has a friend whose light sensitivity is so severe that she can't even look up at night when there's a full moon over clear skies.

I don't know if she has any sunglasses with prescription tint, but she does often wear multiple pairs of sunglasses at once (stacking fitovers of various sizes). She also wears sunglasses whenever she uses the computer.

I forget what condition my sister's friend has, but she's legally blind. Extreme light sensitivity is often a feature of retinal diseases that also cause other visual acuity problems.



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