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N

Near Point
The point at which an object must be placed to have a sharp image on the retina of a fully accommodated eye.
Nearsightedness

When the focusing ability of a person's eyes has decreased to the point where vision at his reading distance becomes blurred and difficult. Nearsightedness is also known as myopia.

Example of a person's vision with nearsightedness:

nearsightedness

Additional keywords and misspellings:
myopia nearsighted myopea nearsight

Nebula
A slight haziness to the cornea; gray opacity of the cornea.
Nevus
The melanotic tissue consisting of an aggregation of melanin containing cells.
Night Blindness
Loss of vision in dim light or at night.
Nyctalopia
Night blindness.
Nystagmus

nis-tag'mus

Rapid, uncontrollable movement of the eyes.

The Eye Encyclopedia is a collection of eye care terminology created by practicing optometrists and ophthalmologists. The information provided is not intended to be a substitute for regular medical care or to diagnose or treat any medical condition, and should be used only as a supplemental source of information. Please consult your doctor if you have any questions or concerns about your eye health.