Unit 3: Alternatives To Eyewear

Question 1

What is the difference between Lasik and PRK?

Answer 1

PRK does not involve a corneal flap

Question 2

How is the epithelium removed in PRK?

Answer 2

With a mechanical brush or applying alcohol solution

Question 3

What does PRK stand for?

Answer 3

Photo refractive keratectomy

Question 4

Which laser is used in both PRK and Lasik

Answer 4

Excimer laser

Question 5

How long is the bandage lens in place in PRK?

Answer 5

5-7 days

Question 6

When would PRK be used instead of lasik?

Answer 6

In patients with a higher prescription, less corneal tissue, or with a higher risk of eye trauma

Question 7

What is it called when you remove corneal tissue with a laser?

Answer 7

Photoablation or photodisruption

Question 8

How much corneal astigmatism can LASIK correct?

Answer 8

+/-3.00D

Question 9

What does LASIK stand for?

Answer 9

Laser-assisted in situ keratomileusis

Question 10

What are two ways of creating a corneal flap?

Answer 10

Femtosecond laser
Mechanical keratome (blade)

Question 11

What sphere can be corrected with Lasik?

Answer 11

+4.00 to -12.00

Question 12

What are some complications that could result from Lasik

Answer 12

-Dry eyes
-Glare or halos
– double vision
– over or under correction
– regression
-various flap problems
-Vision loss or changes
-Epithelial ingrowth
-corneal neuralgia