If you mean senstive to light it can be due to big pupils, light color eyes (gray, green, blue), eye disease such as corneal problems or cataracts, inflammation in the eye.
Some people are just very sensitive. I wear a hat with a bill and sunglasses on most bright days.
JCH MD
How do we solve the sensitive issue? I don't want to be stuck wearing sunglasses whenever its bright.I think I have Large pupils is that why?
Sorry to burst your bubble but dry eyes remains one of the major reasons for people of all ages not being able to wear contacts or to have to stop wearing them. This is especially true for women over 40 because of hormone driven changes that dry the body.
There is no test to assess how light sensitive someone is but generalizations that apply is the lighter the color of the iris (blue, gray, green) tend to be more sensitive than shades of brown and large pupils tend to be more sensitive than smaller pupils.
JCH III MD