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Gullstrand, Allvar

(Encyclopedia)Gullstrand, Allvar älˈvär gŭlˈstränd [key], 1862–1930, Swedish ophthalmologist. He was professor (1894–1927) successively of eye therapy and of optics at the Univ. of Uppsala. He applied the...

Herophilus

(Encyclopedia)Herophilus hĭrŏfˈələs [key], fl. 300 b.c., Greek anatomist, called by some the father of scientific anatomy. A contemporary of Erasistratus at Alexandria, he made public dissections, comparing hu...

sclera

(Encyclopedia)sclera: see eye.

cornea

(Encyclopedia)cornea: see eye.

pupil

(Encyclopedia)pupil: see eye.

iris, in anatomy

(Encyclopedia)iris: see eye.

ocellus

(Encyclopedia)ocellus (pl. ocelli): see eye.

tears

(Encyclopedia)tears, watery secretion of the lacrimal gland, which is located at the outer corner of the eye socket immediately above the eyeball. Tearing, or lacrimation, is a continuous and largely involuntary pr...

retina

(Encyclopedia)retina: see vision; eye. ...

Hartline, Haldan Keffer

(Encyclopedia)Hartline, Haldan Keffer, 1903–83, American physiologist, b. Bloomsburg, Pa., M.D. Johns Hopkins, 1927. From 1931 to 1949 (except for 1940–41), he was a researcher at the Eldridge Reeves Johnson Fo...