The Red Eye, Cataracts and Corneal Transplantation 2 Flashcards Preview

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Flashcards in The Red Eye, Cataracts and Corneal Transplantation 2 Deck (16)
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1
Q
cornea
A
transparent layer covering the iris and pupil.
2
Q
Aqueous chamber:
A
sits directly behind the cornea and is filled with fluid for maintaining the pressure to the eye.
3
Q
iris
A
the colored part of the eye that contracts/expands with light intensity to adjust the pupil size
4
Q
pupil
A
opening in the eye center where light passes through
5
Q
lens
A
sits behind the anterior chamber and focuses light onto the retina through refraction; changes shape with relaxation/contraction of the zonular fibers projecting from the ciliary bodies
6
Q
conjunctiva
A
clear mucous membrane lining the sclera superficially and the insides of the eyelids; functions to lubricate the eye
7
Q
sclera
A
the outer white part of the eyeball made of dense, fibrous tissue
8
Q
retina
A
tissue lining the inner surface of the eye responsible for conducting light information to the cortex
9
Q
choroid
A
layer of the eye between the sclera and retina; made up of blood vessels and connective tissue
10
Q
vitreous cavity and gel
A
1. substance of the posterior eyeball
2. attached to the retina
11
Q
Corneal transplant surgery is for those who
A
need a new cornea
12
Q
indications for corneal transplant surgery
A
1. Pseudophakic or aphakic bullous keratopathy (corneal edema following cataract surgery)
2. *Endothelial dystrophy
3. *Keratoconus (defect in cornea leading to degeneration)
4. Trauma to the cornea
5. HSV/viral infection
6. Regraft
7. *Corneal dystrophy
8. Corneal degeneration
9. *Unvascularized corneas
10. Chemical injuries
13
Q
basic steps involved with cataract surgery
A
1. Small incision (2.2 mm) is made in the cornea or sclera
2. Cataract inside capsular bag (the tissue around the lens) is broken up and removed
3. Intraocular lens is folded and inserted into the capsular bag
4. Incision is closed
14
Q
indication for cataract surgery.
A
patient’s who have diminished quality of life resulting from vision loss associated with cataracts

(i.e. difficulty driving, ability to work, etc.)
15
Q
Cataracts:
A
1. common cause of vision loss in aging patients.
2. lens becomes cloudy and brown, which diminishes its ability to focus light onto retina
3. color vision becomes dull and overall, vision becomes cloudy
16
Q
Cataracts are treated:
A
by surgically replacing the lens