Retinal nerve fibers exit the eye through the optic nerve, located nasally and on the same plane as the anatomical center of the retina. There is no retinal tissue overlying the optic nerve head. The optic nerve head or optic disc is oval in shape and measures approximately 1.75 mm. vertically and 1.5 mm horizontally.
Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning. the strength and power that are considered typical qualities of a man, especially sexual energy virility symbol: His car is a red turbo-charged Porsche, the classic virility symbol. Synonyms and related words. Physical strength:strength, force, energy...
Full Definition of VITALITY. 1. a: the peculiarity distinguishing the living from the nonliving b: capacity to live and develop; also: physical or mental vigor especially when highly developed.