Nuclear sclerosis is a type of cataract that mainly occurs due to the hardening and yellowing of the eye's lens. This condition is generally associated with the aging process, although it advances at a slow rate, notes VisionAware.
A nuclear sclerotic cataract is characterized by a progressive opacification of the central part of the lens called the nucleus. As the disease develops with age, patients may experience an improved clarity in their near vision., albeit only for a short time. This symptom is commonly known as "second sight."
Other symptoms of a nuclear sclerotic cataract include a decline in distance vision, trouble with night driving, monocular diplopia and loss of the ability to distinguish between colors, states Digital Reference of Ophthalmology of the Columbia University in New York.