Chapter 17 - Eye and Ear - Errors of Refraction

Question 1

Astigmatism

Answer 1

defective curvature of the cornea or lens of the eye

Question 2

Hyperopia

Answer 2

farsightedness

Question 3

Myopia

Answer 3

nearsightedness

Question 4

Presbyopia

Answer 4

impairment of vision due to old age reducing lens accommodation

Question 5

Cataract

Answer 5

clouding of the lens, causing decreased vision

Question 6

What are treatments for cataracts?

Answer 6

Surgical removal of the lens and implantation of an artificial lens behind the iris

Question 7

Chalazion

Answer 7

a small, hard, cystic mass on the eyelid; formed as a result of chronic inflammation of sebaceous gland along margin of eyelid

Question 8

What does Chalazions often require?

Answer 8

incision and drainage.

Question 9

Diabetic retinopathy

What can happen during Duavetuc retinopathy?

Answer 9

• retinal effects caused by diabetes mellitus include

Microaneurysms
Hemorrhages
Dilation of retinal vein
Neovascularization (new blood vessels)

Question 10

Glaucoma

Answer 10

increased intraocular pressure damages the retina and optic nerve

Question 11

Macular degeneration

Answer 11

progressive damage to the macular of the retina- loss of central vision

Question 12

Nystagmus

Answer 12

repetitive rhythmic movements of one or both eyes

Question 13

Strabismus

Answer 13

abnormal deviation of the eye

Question 14

Retinal detachment

Answer 14

two layers of the retina separate from each other

Question 15

Photopsia

Answer 15

bright flashes of light

Question 16

Floaters

Answer 16

vitreous clumps of retina

Question 17

Scleral buckle

Answer 17

a belt used to buckle the retina to the sclera

Question 18

Pneumatic retinopexy

Answer 18

a gas bubble is injected in vitreous cavity to help reattach the retina

Question 19

Pneumatic retinopexy

Answer 19

a gas bubble is injected in vitreous cavity to help reattach the retina