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Anatomy > eye > Flashcards

eye Flashcards

1
Q

what is the sclera?

A

whites of the eye

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2
Q

what is the cornea?

A

transparent center part in front of the iris

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3
Q

what is the iris?

A

pigmented part of eye that regulates the amount of light let in

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4
Q

what is pupil

A

opening in iris

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5
Q

what is conjunctiva?

A

lining sclera and eyelid

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6
Q

what is conjunctivitis?

A

pink eye

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7
Q

what is the lacrimal apparatus?

A

produces/collects tears

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8
Q

what are the lacrimal canaliculi?

A

from lacrimal puncta to nasolacrimal duct

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9
Q

what is the nasolacrimal duct?

A

drains tears into nasal cavity, where they are eventually swallowed

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10
Q

what is the lens?

A

biconvex, transparent structure inside eyeball, changes shape to focus light rays, held in place by suspensory ligament

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11
Q

what is the fibrous tunic?

A

avascular, contains cornea for admitting and refracting light and the sclera for protecting the inner parts of the eye

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12
Q

what is the vascular tunic?

A

contains choroid that has blood vessels for nourishing retina, the iris, and the ciliary body

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12
Q

what is the retina?

A

posterior 3/4 of eye contains the pigmented layer and it absorbs excess light to prevent reflection and provides vitamin A to photoreceptors

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12
Q

what is the ciliary body?

A

the smooth muscle contacts and the suspensory ligaments relax to make the lens rounder, and the epithelial lining produces aqueous humor

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13
Q

what is the pigmented layer?

A

outer layer adjacent to choroid

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14
Q

what is the neutral layer?

A

inner layer that receives light information and photoreceptors converts it into nerve impulses that are sent via the optic nerve to the brain

15
Q

what are rods?

A

low reduced light, black and white

16
Q

what are cones?

A

require more light, color

17
Q

what is the optic disc?

A

blind spot where the optic nerve exits the eye, contains no photoreceptors

18
Q

what is the macula lutea?

A

lateral to the optic disc in the center of fovea centralis that has the sharpest vision only cones present

19
Q

what is the anterior cavity of eye?

A

between cornea and lens and separated from posterior by the iris, filled with aqueous humor

20
Q

what does the aqueous humor do?

A

supplies nutrients, removes waste for lens and cornea, continually produced and replaced

21
Q

what is the posterior cavity?

A

between lens and retina, contains vitreous humor

22
Q

what is vitreous humor?

A

helps maintain shape of eye and keep retina against choroid, not continually produced

Anatomy (23 decks)

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