Vision Impact after Procedures

Question 1

What is a iridectomy?

Answer 1

removal/move of the iris

Question 2

when is iridetomy (glaucoma surgery) used?

Answer 2

allows for flow of aqueous humour to release pressure of eye due to glaucoma

Question 3

what is a trabeculectomy (filtration surgery) (glaucoma surgery)? 3

Answer 3

-small portion of the trabecular meshwork is surgically removed
-allows the aqueous to filter out of the anterior chamber
-Form a conjunctival bleb

Question 4

How does the Laser Trabeculoplasty (glaucoma surgery) work ? 3

Answer 4

-An argon laser is used to
produce mild burns in the trabecular meshwork
-The trabecula shrinks mildly
-Which opens up the interspaces
in the meshwork

Question 5

what is a sclerectomy(glaucoma surgery)? 3

Answer 5

-small button of sclera is removed with scissors or small punch
-treats open angle glaucoma
-permeant drainage

Question 6

What is the Selective Laser Trabeculoplasty (SLT)(glaucoma surgery)?

Answer 6

targets selected cells which triggers response to increase flow of aqueous humour

Question 7

What are the two main types of corneal transplant (depends on what part of the cornea clouded) ?

Answer 7

-Lamellar Partial penetrating
procedure
-Penetrating or full-thickness
corneal transplant

Question 8

What are the three Refractive Surgeries?

Answer 8

-Photorefractive -keratectomy (PRK)
-Phototherapeutic keratectomy (PTK)
-Laser in situ keratomileusis (LASIK)

Question 9

How is PRK done?

Answer 9

epithelium is removed by
spatula or brush or
by using the laser to reveal Bowman’s
layer

Question 10

what are the cons to PRK? 5

Answer 10

-Delayed epithelial healing
-Light sensitivity
-Corneal haze
-Overcorrection
-Under correction

Question 11

How does PTK work?

Answer 11

Removal of tissue from the cornea to correct a medical problem with the eye

Question 12

How is LASKIK surgery done? 4 steps

Answer 12

1) A thin flap of corneal tissue with a hinge is created
2) The flap is then retracted
3) The excimer laser is used to ablate tissue beneath the flap
4) The flap is repositioned

Question 13

What is the con of LASIK?

Answer 13

Corneal ectasia is a rare,
potentially devastating
complication

Question 14

What are the two main specific uses for Excimer lasers?

Answer 14

1) Eliminated or reducing refractive errors
3) Removing corneal scars, corneal dystrophies, stopping
recurrent corneal erosions and smoothing out corneal surfaces

Question 15

What are the main types of Eyelid Surgeries?

Answer 15

1. Entropion (eyelashes roll in and rub)
2. Ectropion (eyelid rolls outward)
3. Ptosis (eyelid droops to cover eye)

Question 16

What is the most common eyelid surgery for entropian?

Answer 16

Ziegler cautery-The cautery is applied to
the area just below the
eyelashes

Question 17

what does ectropian surgery include? 2

Answer 17

-grafts of skin for the eyelids (upper eyelid/behind the ear)
-surgical removal of these tissues to properly
evert the lid so that the lid margin lies in its
correct position against the globe

Question 17

How is Ptosis corrected?

Answer 17

If the levator muscle still functions:
*a resection of this muscle will be performed either from the
under surface of the eyelid Or through the eyelid skin

Question 17

what can cause ectropian?

Answer 17

result from a laxity of the skin and underlying structures.

Question 18

What is a Pterygium?

Answer 18

Fibrovascular growth of the actinally damaged conjunctiva that invades a portion of the cornea from the limbus

Question 19

What is a Dacryocystorhinostomy?

Answer 19

Blockage of the tear canal may result from obstructions arising anywhere

Question 19

There is a high recurrence rate for pterygiums? yes/no - if yes percentage?

Answer 19

yes - 5% to 40%

Question 19

What are the three main methods of surgical removal for a pterygium?

Answer 19

*Bare scleral method
*Transplantation of the head
*Conjunctival grafting

Question 20

How is Dacryocystorhinostomy corrected?

Answer 20

An opening 8 to 10 mm in size, is made in the wall of the nose and a union is created between the mucosal lining of the nose in this area and the lacrimal sac