Characteristics of the cornea

refracts light, transperants, no blood vessles to diffuses oxygen from the outside

coloured bit of your eye, controlls size of your pupil

not actually a structue, a gap that allows light to pass through into retina.

can change shape, which allows it to decide how strongly it refratcs light. Helps to always focus the light perfectly ontot he retina

see in clour, but doesnt work well in low light.

ore sensitive, but only sees in black and white. Allows you to see things in low light.

Only cone cells, we try to focus light on her so we can see things clear

takes impulses generated by the receptor cells and submits to the brain

bright light: constrict to prevent from damage low light: dialate to be able to let more light in, better vision.

contract to constrict in high light-closer to the pupil

contract to dialate in low light-wrapped around the circular mucles

reflex that changes the refractive power of the lense, so you can see near and far

for light to hit the fovea:

it must be refracted through the cornea and lense. The lense can fine tune the rays, so it can always land on the fovea.

must be refratced alot, cililarry mucle contract, making pupil short and fat. Suspensory ligiments slaken.

llight doesnt need to be refracted as strongly. Suspensory ligiments are pulled tought, and cilliarry mucles relax. making pupil large.

cant refract enough, close objects wont hit the fovea, making image blurry. use convex glasses. hyperopia

refracts to much, image is formed before it hits fovea, making image blurry. use concave glasses. myopia

Help

Options

focusNode

Didn't know it?
click below

Knew it?
click below

Don't Know

Remaining cards (0)

Know

retry

shuffle

restart

0:00

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Science physics Eyes

Term 4 physics unti: eyes

Question	Answer
Characteristics of the cornea	refracts light, transperants, no blood vessles to diffuses oxygen from the outside
iris	coloured bit of your eye, controlls size of your pupil
pupil	not actually a structue, a gap that allows light to pass through into retina.
lense	can change shape, which allows it to decide how strongly it refratcs light. Helps to always focus the light perfectly ontot he retina
retina is made out of two different cells:	cone cells and rod cells
cone cells:	see in clour, but doesnt work well in low light.
rod cells:	ore sensitive, but only sees in black and white. Allows you to see things in low light.
fovea	Only cone cells, we try to focus light on her so we can see things clear
optic nerve	takes impulses generated by the receptor cells and submits to the brain
iris reflex	bright light: constrict to prevent from damage low light: dialate to be able to let more light in, better vision.
circular mucles:	contract to constrict in high light-closer to the pupil
radial mucles:	contract to dialate in low light-wrapped around the circular mucles
accomodation	reflex that changes the refractive power of the lense, so you can see near and far
cilarry mucles and suspensory ligiments	controlls shape of lense
for light to hit the fovea:	it must be refracted through the cornea and lense. The lense can fine tune the rays, so it can always land on the fovea.
close objects:	must be refratced alot, cililarry mucle contract, making pupil short and fat. Suspensory ligiments slaken.
far objects:	llight doesnt need to be refracted as strongly. Suspensory ligiments are pulled tought, and cilliarry mucles relax. making pupil large.
long sighted is:	cant refract enough, close objects wont hit the fovea, making image blurry. use convex glasses. hyperopia
short sighted	refracts to much, image is formed before it hits fovea, making image blurry. use concave glasses. myopia

Created by: Emma1322

"Know" box contains:
Time elapsed:
Retries: