Vision Impact after Procedures Flashcards

1
Q

What is a iridectomy?

A

removal/move of the iris

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2
Q

when is iridetomy (glaucoma surgery) used?

A

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

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3
Q

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

A

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

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4
Q

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

A

-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

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5
Q

what is a sclerectomy(glaucoma surgery)? 3

A

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

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6
Q

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

A

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

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7
Q

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

A

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

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8
Q

What are the three Refractive Surgeries?

A

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

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9
Q

How is PRK done?

A

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

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10
Q

what are the cons to PRK? 5

A

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

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11
Q

How does PTK work?

A

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

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12
Q

How is LASKIK surgery done? 4 steps

A

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

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13
Q

What is the con of LASIK?

A

Corneal ectasia is a rare,
potentially devastating
complication

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14
Q

What are the two main specific uses for Excimer lasers?

A

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

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15
Q

What are the main types of Eyelid Surgeries?

A
  1. Entropion (eyelashes roll in and rub)
  2. Ectropion (eyelid rolls outward)
  3. Ptosis (eyelid droops to cover eye)
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16
Q

What is the most common eyelid surgery for entropian?

A

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

17
Q

what does ectropian surgery include? 2

A

-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

17
Q

How is Ptosis corrected?

A

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

17
Q

what can cause ectropian?

A

result from a laxity of the skin and underlying structures.

18
Q

What is a Pterygium?

A

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

19
Q

What is a Dacryocystorhinostomy?

A

Blockage of the tear canal may result from obstructions arising anywhere

19
Q

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

A

yes - 5% to 40%

19
Q

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

A

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

20
Q

How is Dacryocystorhinostomy corrected?

A

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