Receptors to collect images by using light to convert into electrical impulses for the brain to interpret.
*A sensory organ
is response to light
of the Nervous system.
detect “visible light”
CORNEA- outermost pat of
-allows light in.
PUPIL- opening where light enters.
-changes size with the amount of light.
pupil size increases
when light is dim.
size decreases when light is bright.
IRIS- surrounds pupil
amount of light into the pupil.
-muscle fibers change size of the pupil.
LENS- where light hits after entering the pupil.
-bends light rays and puts the image upside down
lens (curved), thick in the middle and thin on the outside.
-brings image into focal point by parallel lines.
to microscope, magnifying glass, & telescope.
-changes direction of light to the retina.
-changes shape to
adjust focus. close-curved/far-flat.
RETINA- where light is sent
to the back of the eye.
-changes light into electrical impulses for the brain to interpret.
dim light receptors. GRAYS
b)cones- bright light receptors. COLORS
OPTIC NERVE- nerve that sends infor to the brain.