Elements of Seeing ( mura namag bio atay) Flashcards
The ___________ of a human is composed of the eye, optic nerve, and certain parts of the brain.
visual system
The _______ is the organ that allows a human to ______ light and produces electrical ______ that will be sent through the optic nerve to the brain.
eye, sense, impulses
The ________ is that part of the visual system where impulses are ____________.
brain, processed
Rays of light pass through the transparent _________ of the eye and through an opening called the ____________.
cornea, pupil
The ______ surrounds the pupil and adjusts for the amount of light available. It ______ and _________ to control the __________ of light the interior of the eye receives.
iris, opens, closes, quantity
The ________ is a transaprent ellipsoidal medium that changes ___________, allowing it to ________ and _____________ the rays of light entering the interior of the eye.
lens, thickness, bend and focus,
The lens concentrates the rays of light on the ______________, a membrance on the back of the eye.
retina
LENS
thickens: ________
narrows: _____________
nearby
distant
The ___________ is composed of nerve cells with _____________ that are shaped like ________ and ___________.
retina, photoreceptors, cones, rods
The photoreceptors that are shaped like _________ provide color vision and respond best to ________ light.
cones, bright
There are three types of cone-shaped photorecepors in the retina, each of the type responds to one ___________ colors of light. which are ______,____,___.
primary, green, blue, red.
About __% of the population, mostly males, has defective color vision.
5%
It is the inability to distinguish colors. commonly _________ and _________.
color blindess, red, green
People who are completely red-green colorblind tend to see red and greens as __________.
yellow
Light is a form of energy known as ___________________.
electromagnetic radiation
