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"SCHEMA INGLESE READING: THE RETINA" - Coggle Diagram
"SCHEMA INGLESE READING: THE RETINA"
What is it?
expansion of the optic nerve
thin layer of light sensitive cells
Function
receving light and turning it into electric impulse
hight regions of the brain
Rods
125 millions
monochromatic image
sensitive to dim light - only night vision
purple pigment called rhodopsin
retinal pigment
Cones
shorter and thicker than rods
sentitive to daylight
chromatic vision
each different pigment is sensitive to a different color
blue, green or red
more combinations among these 3 colors more combinations of colors
Fovea
small depression - rear part of the eyeball
contains only cone cells at hight density