Term
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Definition
| designated to receive light and produce electrical signals |
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Term
|
Definition
-Clear, non cellular front of the eye
-light passes through, not refracted (bending of light waves) |
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Term
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Definition
-lens refracts light to focus on retina
-Ciliary body has muscles parallel to lens
-muscle contraction allows lens to round up focus hear
-muscle relax for distance vision |
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Term
| Does the iris open and/or close pupils? |
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Definition
|
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Term
| what kind of muscle contracts and adjust to light level? |
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Definition
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Term
| Where is the aqueous humor located? |
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Definition
| between the cornea and lens |
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Term
| what function does the aqueous humor do? |
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Definition
| constant production and drainage |
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Term
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Definition
| decrease drainage or excess production which leads to increase in pressure which leads to retinal damage |
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Term
| what happens to beta blockers? |
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Definition
| decrease production, cholinergic agonist increase damage |
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Term
| Where is the vitreous humor located? |
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Definition
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Term
| What function does the vitreous humor perform? |
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Definition
| maintenance of eyeball shape |
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Term
| Where are the visual receptors of the eye? |
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Definition
| In the back of the eye in the retina |
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Term
| How many cell layers does the retina have? |
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Definition
|
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Term
| What is found behind the retina? |
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Definition
|
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Term
| What is special about the layer of the choroid? |
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Definition
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Term
| What are the 3 special things that the choroid does? |
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Definition
-absorbs light
-no reflection
-no signal |
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Term
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Definition
|
|
Term
| what in the lens refracts light? |
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Definition
|
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Term
| What does the Glycoprotein focus on? |
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Definition
|
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Term
| where does light pass through within the retina and what does it reach? |
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Definition
| Light passes through bipolar and ganglion cells to reach photoreceptor cells |
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Term
| Where do bipolar and ganglion cells pull back at? |
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Definition
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Term
| What is best color vision? |
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Definition
|
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Term
| What type of concentration is Fovea? |
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Definition
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Term
|
Definition
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Term
| Rods are mostly what kind of receptors? |
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Definition
|
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Term
| Cones are what kind of receptors? |
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Definition
| they are color and fewer over all receptors |
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Term
| What do rods and cons produce? |
|
Definition
| Receptor potentials, no ACTION POTENTIAL |
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Term
| What does both receptors have in common? |
|
Definition
| both converge on bipolar cells |
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Term
| Bipolar cells are activated by? |
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Definition
|
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Term
| With bipolar cells what does the edge effect do? |
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Definition
| it center/surround on and off effects |
|
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Term
| does bipolar cells have AP? what goes along with ganglion cells? |
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Definition
| There is no AP and synapse comes with ganglion cells |
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Term
| ganglion cells reach the threshold and fire what? Once ___ is fired they leave the eye and head towards what? |
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Definition
| ACTION POTENTIAL, AP, CNS |
|
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Term
| What kind of info does the ganglionic cells carry? where does it carry it to? |
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Definition
| visual info, lateral geniculate and the cortex |
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Term
| Optic nerves are bundles of what? |
|
Definition
| bundles of ganglion cell axons |
|
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Term
| what does the optic nerve create as the axons pass through retina? |
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Definition
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|
Term
| in the optic nerve what fills in the blind spot with expected image? |
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Definition
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Term
| What receives info from the ganglion cells? |
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Definition
|
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Term
| the lateral geniculate is similar in function to what part of the brain? what is the function of those parts? |
|
Definition
| thalamus,edits information to the cortex |
|
|
Term
| where is the visual cortex located? |
|
Definition
| located in many areas in occipital bone |
|
|
Term
| what kind of images do you receive in the visual cortex? |
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Definition
|
|
Term
| When changes the lens thickness alters focal point for near and far vision |
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Definition
|
|
Term
| What muscles control focus for accomodation? |
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Definition
|
|
Term
| Your lens gradually hardens over? |
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Definition
|
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Term
| Hardening reduces rounding of lens for near or far vision? |
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Definition
|
|
Term
| At about what age does your eyes start to have difficulty focusing on near objects? |
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Definition
|
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Term
| The inability to focus on the retina |
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Definition
|
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Term
| ______ in nearsighted, eyeball to long, focus in front of retina |
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Definition
|
|
Term
| ________ is far sighted, eye ball too short, focus behind retina |
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Definition
|
|
Term
| What is the visual pigment in rod cells? |
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Definition
|
|
Term
| What combination has opsin and retinene |
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Definition
|
|
Term
| light hits the retinere and partially splits it from opsin. What is another name for this? |
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Definition
|
|
Term
| What is recycled 14 per second? |
|
Definition
| Opsin now active- G protein system |
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Term
| Color vision has how many different opsins with retinene |
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Definition
|
|
Term
| What 3 colors does the eye peaks at for the wavelengths |
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Definition
|
|
Term
| With color blindness what is pissing? |
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Definition
|
|
Term
| More men then women can't distinguish what? |
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Definition
| Certain wavelengths with equal activation of remaining opsins. |
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