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Basic Eye Anatomy from Opriam Lecture
n/a
20
Physiology
Undergraduate 3
10/28/2009

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Cards

Term
Sclera
Definition
White part of the eye.
Term
Pupil
Definition
Hole in eye
Term
Iris
Definition
colored part of eye.
Term
vitreous humor
Definition
The "goo" that fills the sclera
Term
Cornea
Definition
First place light hits and goes through. It is the most refractive part of the eye
Term
Lens
Definition
After light goes through the pupil, hits this part of the eye. It is suspended, meaning it can be focused via the lens shape.
Term
Optic chiasm
Definition
After a signal is generated in the retina, goes through the optic nerve, and runs into this, which describes how the nasal side information from both eyes goes to the contralateral side of the brain, while the temporal side hits the ipsilateral side of the brain.
Term
Retina
Definition
Thin layer of tissue that is a projection from the CNS
Term
Blood vessels function in the eye
Definition
Supply the retina with nutrients
Term
Fovea
Definition
A little dip in the retina. It is area of highest acuity in vision
Term
Optic disc
Definition
Area of the eye where the optic nerve passes through, on the nasal side of the eye. Leaves a blind spot
Term
Rods and cones
Definition
Sensory neurons of the eye. Receive the original signal. Project to bipolar cells, which then project to amacrine and horizontal cells, which then project to ganglion cells.
Term
Inner nuclear layer
Definition
Horinzontal cells, amarcine cells, bipolar cells
Term
Outer nuclear layer
Definition
Rods and cones
Term
Location of rods and cones, ganglion cells in eye
Definition
Rods and cones are located in the back of the eye, while ganglion cells are located in the front (STUPID ORGANIZATION!!)
Term
Primary function of rods, density
Definition
High density. Rods are primarily for light and dark/peripheral vision
Term
Function of cones, density
Definition
Lower density, except in the fovea, where highly concentrated. Provide high acuity and color vision.
Term
comparison of rod and cone disc segments
Definition
Rod segments are larger/fatter, absorb more light. Physically stacked upon each other. High concentration of rhodopsin in discs - about 40,000 molecules per disc.
Term
4 visual pigments
Definition
red, blue, green, depicted via cone cells, and light/dark, via rods.
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