jaundice.

Yellowness of the skin, lining tissues, and secretions due to bile pigments in the blood.

—Layman’s Medical Dictionary, Harry Swartz, M.D., 1963.

lens.

1. A crystal or piece of glass that bends rays of light passing through it. . . . 2. The transparent egg-shaped body lying behind the pupil of the eye, called the crystalline lens of the eye.

—Layman’s Medical Dictionary, Harry Swartz, M.D., 1963.

lenticular.

1. Resembling or relating to a lens. 2. Relating to the crystalline lens of the eye.

—Layman’s Medical Dictionary, Harry Swartz, M.D., 1963.

livid.

A pale, leaden, bluish color. The discoloration produced by an injury.

—Layman’s Medical Dictionary, Harry Swartz, M.D., 1963.

macula.

A pigmented spot upon the skin. 2. A spot in the retina. . . .

—Layman’s Medical Dictionary, Harry Swartz, M.D., 1963.

melanin.

Black or dark-brown pigment found, in some degree, in all people and responsible for complexion.

—Layman’s Medical Dictionary, Harry Swartz, M.D., 1963.

monocular.

1. Relating to , or affecting, one eye. 2. Having a single eyepiece as in the monocular microscope.

—Layman’s Medical Dictionary, Harry Swartz, M.D., 1963.

myopia.

Nearsightedness, due to a greater than normal length of the eyeball from front to back, resulting in the image falling in front of the retina. Lenses . . . that push the image back onto the retina are used to correct this condition.

—Layman’s Medical Dictionary, Harry Swartz, M.D., 1963.

nictitation.

Excessive winking.

—Layman’s Medical Dictionary, Harry Swartz, M.D., 1963.

night blindness.

Defective night vision. When temporary may be due to a deficiency of vitamin A. When permanent may be due to diseases of the retina. . . .

—Layman’s Medical Dictionary, Harry Swartz, M.D., 1963.