I find this problem varies from day to day with me. I always wear sunglasses as well... and some days I can not wear them and see fine in bright daylight... the others I swear I go blind. So far the biggest factor I've seen would be how much sleep I got the night before. If I'm tired I generally can't handle the light.
I don't think wearing sunglasses permanently affects your pupils ability to constrict or adjust for light.
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