hemeralopia

n. day blindness, condition in which vision is seriously impaired in brightly lit conditions

Hemeralopia (Greek for "sun blindness") is the inability to see clearly in bright light and is the exact opposite of nyctalopia (night blindness). In hemeralopia, daytime vision gets worse and worse. Nighttime vision remains unchanged due to the use of rods as opposed to cones (during the day), which get affected by hemeralopia and in turn degrade the daytime optical response.
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Hemeralopia /hem·er·a·lo·pia/ day blindness ; defective vision in bright light. hem·er·a·lo·pi·a n. [more]Hemeralopia - Community and Resources

Noun
1. inability to see clearly in bright light
(synonym) day blindness
(hypernym) visual impairment, visual defect, vision defect, visual disorder

n. night blindness, defect which limits or impairs night vision