second sight

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sec·ond sight

improved near vision in the aged as a result of increased refractivity of the nucleus of the lens causing myopia.

sight

(sit) [AS. sihth]
1. The power or faculty of seeing.
2. Range of sight.
3. A thing or view seen. Synonym: vision; visual perception

blind sight

The ability to see that occurs in persons who are blind because of a brain lesion rather than damage to the eye. It is manifested by their being able to reach for and track an object. These individuals apparently do not know they can see.

day sight

Night blindness.

far sight

Hyperopia.

near sight

Myopia.

night sight

Day blindness.

old sight

Presbyopia.

second sight

Senopia.

sight, second 

Improvement of near vision in the elderly resulting from increased refraction of the nucleus of the crystalline lens. It often occurs in people with incipient cataract. Syn. gerontopia; senile lenticular myopia.