Condition of night blindness where vision is poor at night but there is good vision on bright days:

Nyctalopia

Nyctalopia is the condition of night blindness characterized by inability to see clearly at night or in dim light and the ability to see clearly in the day. Deficiency of vitamin A leads to nyctalopia. Other possible causes of Nyctalopia include myopia, cataract, retinitis pigmentosa and some glaucoma medications.