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Title: Anatomy of the Eye
Description: These notes discuss the anatomy and function of the eye which includes describing the parts of the eye and what each one does for normal function.
Description: These notes discuss the anatomy and function of the eye which includes describing the parts of the eye and what each one does for normal function.
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BIO 230
...
Vitreous humor creates pressure on
retina to keep into place
• Supports the position of the lens
• Supports the position of the retina
• Aqueous humor can flow across the vitreous fluid and over the retina
• Aqueous fluid
• If this fluid cannot drain through the canal of Schlemm, pressure builds up
• This is glaucoma-suction cup on eye will tell whether has high pressure or low pressure,
checking for glaucoma
• Vitreous fluid
• If this fluid is not of the right consistency, the pressure is reduced against the retina
• The retina may detach from the posterior wall (detached retina)
• Visual Pathways-need to know this
• Light waves pass through the cornea
• Pass through the anterior chamber
• Pass through the pupil
• Pass through the posterior chamber
• Pass through the lens
• The lens focuses the image on some part of the
retina
• This creates a depolarization (we are taking the resting membrane potential-the
chemicals on outside versus chemicals on inside-some chemicals go inside and some go
outside, starts that action potential or electrical activity to be moved down to axon) of
the neural cells
• Signal is transmitted to the brain via CN II
**Optic chiasm- where transfer of information for eyes happens to switch right eyeball to left side of
brain and to send left eyeball info to right side of the brain, right behind eyeball**
• Visual Pathways
• The retina
• There are rods and cones all over the retina
• 100% cones in the fovea centralis area
• The best color vision is when an object is focused on the fovea centralis
• 0% rods or cones in the optic disc area
• If an object is focused on this area, vision does not occur
• Also known as the “blind spot”
• Visual Pathways
• The retina (cont
...
• Cataract surgery-where lens gets cloudy, like seeing through fog, slit cornea, cut lens
out, and then take out lens and puts artificial foldable lens to refract light back into the
eye
Title: Anatomy of the Eye
Description: These notes discuss the anatomy and function of the eye which includes describing the parts of the eye and what each one does for normal function.
Description: These notes discuss the anatomy and function of the eye which includes describing the parts of the eye and what each one does for normal function.