Card Set Information
Ch 12 Topic 16
Contains 80% of focusing power; light first enters the eye through it.
White portion of the eye continuous with the cornea; is an attachment for the extrinsic muscles of the eye, and protects the outer surface.
Sends visual info in the form of neurons to the CNS.
The "blind spot" of the eye with no receptor cells; where neurons leave the eye to go to the CNS.
Folds of epithelium covering the ciliary muscle.
A smooth muscular ring that projects into the interior of the eye.
Contains photoreceptors, also contains pigment cells, supporting cells, and neurons; where light is gathered.
Supports the lens and controls its shape.
The amount of light entering the eye and the size of the pupil is controlled by this.
Is composed of specialized epithelial cells that focuses by changing shape; is held in position by the suspensory ligaments of the ciliary body.
For distant vision, when ciliary muscles relax, suspensory ligaments become tight and the lens becomes _____.
For close vision, when ciliary muscles contract, suspensory ligaments become loose and the lens becomes _____.
What are the 2 types of photoreceptors?
1) Rods (detect black and white)
2) Cones (detect color)
This type of photoreceptor detects color, requires more light, for fine vision, contains the color-sensitive pigment iodopsin.
This type of photoreceptor detects black and white, requires less light, for course vision, contains the light-sensitive pigment, rhodopsin.
Color-sensitive pigment found in cones.
Light-sensitive pigment found in rods.
Lies in the visual axis' pathway and contains the fovea centralis.
The point of sharpest vision located in the macula lutae.
The bending of light; the greatest amount of it is required to view objects that are very close to the lens.
The sharpest vision in the eye, or visual acuity, occurs at the fovea centralis, where there is a higher density of _____.
What are the 3 color pigments found in cones?
1) Erythrolabe (sensitive to red)
2) Chlorolabe (sensitive to green)
3) Cyanoabe (sensitive to blue)
This type of vision sees objects less than 20 ft. away, and the light waves run at an angle.
Stereoscopic vision requires 2 eyes, known as _____.
If an object is more than 20 ft. away, the light waves run _____.
What is the carbonic acid disassociation formula?
CO2 + H2O <> H2CO3 <> H+ + HCO3-
What is Fick’s Law?
(Rate of Diffusion) Dk x [(CG x SA x T) / (MW x MT)]