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anatomy eye
quiz 2 on the eye
| Question | Answer |
|---|---|
| macule lutera | yellow disk |
| fovea centralis | is inside the macula lutera and is an area packed with cones |
| color vision | due to 3 types of cones/ red,green,blue |
| rods | rods contain a photo sensative chemical called rhodopsin(visual purple). DIM LIGHT= moe sensative |
| R,G + B CONES | the ratio of red green and blue cones stimulated determines the color that you see |
| brightness of color | brighness of a coloris determined by the #number of impulses a sec. sent to the brain |
| visual colors | red,orange,yellow,green,blue,indigo,violet > ultra violet |
| color blind | you lack red,green,blue cones, it's genetic and is a sex linked diease on X chromosomes |
| trichromat | you can see all colors |
| dichromat | 1 missing type of cones |
| monochromat | no cones |
| dark adaptation | this is when going from BRIGHT LIGHT to DIM LIGHT. this is when you break down all the chemicals in the rods+cons. you need time in the dark to rebuild chemicals |
| light adaptation | excess chemicals break down. going from DIM LIGHT to BRIGHT LIGHT |
| purkinje shift | shift from rods + cons(dawn)/ cons to rods(night) |
| inverted retina | when the path of the impulse is opposite of the path of the light. |
| optical illusion | error in visual judgement |
| visual pathway | vision crosses over. some of the left eye can see the right field. some of the right can see stuff in the left field. |
| lateral geniculate body | turns image right side up |
| visual acuity | sharpness of vision 20/20 means your average |
| after image | image seen after initial stimulas is over. positive-same coloras original. negative- is opposite. |
| nyctalopia | night blindness |
| diplopia | double vision |
| amblyopia | lazy eye weak extrensic muscle in one eye |
| glaucoma | to much aqueous fluid |
| cataracts | cloudy area forms on the cornea or lens |
| diabetic retinaopathy | bleeding into vitreous fluid |
| macula degeneration | macula lutera(yellow disk) breaks down to much pressure |
| nystigma | uncontrolled eye movement |
| sty | inflammation of the oil gland |
| astigmatism | irregular cornea lens |
| floaters | see spots epethelial cells floatindg in the vtreous fluid |
Created by:
ktheobald11
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