Flashcards in anatomy final - vision Deck (11)
Bending of light rays (necessary for focus) from air, cornea, aqueous humor, lens, vitreous humor.
Rounding of lens for near vision
Nearsightedness - eyeball is too long, so image focuses in front of fovea.
Farsightedness - eyeball is too short and image focuses behind fovea.
Failure of lens to accommodate. Lens remains flat for far vision. It loses elasticity. This is what happens for old farts.
Constriction of pupil
Improves depth of field.
Focusing both eyes on same object. Improves depth perception.
Photoreceptors for dim, black and white vision. Located all over retina except fovea.
Adjustment to change from bright light to dim light.
Photoreceptors for detailed color vision. Most concentrated in macula lutea.