What’s wrong with a child who can see well in the dark but has trouble seeing in daylight or bright light?

There are various causes: ① Some eye diseases in which the central part of the cornea or lens is cloudy while the peripheral part remains transparent, such as nuclear cataract, congenital round-nucleus cataract or anterior or posterior pole cataract, and small self-pattern in the central part of the cornea. ②In pathological pupil dilatation, the vision is poor due to photophobia in daytime bright light. ③Some disorders such as congenital panchromatopsia, macular degeneration, optic nerve atrophy after axial optic neuritis, etc., any lesion on the central concavity of the macula or the conduction pathway associated with the cone cells at the central concavity can cause poor vision from daytime, while good vision at night in low light.