| A | B |
|---|
| absolute threshold | the level of sensory stimulation necessary for sensation |
| adaption | the gradual loss of attention to unneeded or unwanted sensory information |
| sensatioin | the process of recieving information from the enviroment |
| perception | the process of assembling and organizing information to make it meaningful |
| white light | light as it originates from the sun or a bulb before it is broken into different frequences |
| cornea | the clear outer covering of the eye, behind which is a fluid |
| iris | a colored circular muscle that opens and closes, forming larger and smaller cirlces to control the amount of light getting into the eye |
| lens | the part fo the eye that focuses an image on the retina |
| pupil | the opening of the eye |
| retina | the back of the eye which contains millions of the receptors for light |
| blind spot | the portion of the retina through which the optic nerve exits and where there are no receptors for light waves |
| rod | a visual receptor most sensitive to the violet-purple wave lengths; very sensitive for night vision |
| color blindness | inablitity to percieve certain colors such as red and green |
