COr.bit

Question 1

Option for pain control for painful blind eyes in debilitated patients unable to undergo surgery and rehabilitation?

Answer 1

Retrobulbar ethanol injection

Question 2

Glass, silicone, and methyl methacrylate are _____ materials used as orbital implants.

Answer 2

Inert

Question 3

Hydroxyapatite and porous polyethylene are _____ materials used as orbital implants.

Answer 3

Biointegrated

Question 4

Disadvantages of nonporous implants:

Answer 4

Decreased motility and implant migration

Question 5

When is ocular prosthesis is fitting done after enucleation or evisceration?

Answer 5

Within 4 to 8 weeks

Question 6

Complications of anophthalmic socket

Answer 6

Deep superior sulcus
Contracture of fornices
Exposure and extrusion of implant
Contracted socket
Anophthalmic ectropion and ptosis
Lash margin entropion

Question 7

Deep superior sulcus deformity is caused by:

Answer 7

Decreased orbital volume

Question 8

Deep superior sulcus deformity is caused by:

Answer 8

Decreased orbital volume

Question 9

Measures to prevent contracted fornices

Answer 9

Preserve conjunctiva
Limit dissection in fornices
Place EOM’s in anatomic positions
Wear conformer

Question 10

Difference of dermis fat graft when used in children vs in adults

Answer 10

Grows in children

Unpredictable fat resorption in adults

Question 11

Causes of contracted sockets

Answer 11

Radiation
Extrusion
Severe initial injury
Poor surgical technique
Multiple socket operations
Removal of prosthesis for prolonged periods

Question 12

Options for anophthalmic ectropion

Answer 12

Tightening of cantal tendons

Recession of inferior retractors and grafting of mucus membrane tissue

Question 13

Causes of anophthalmic ptosis

Answer 13

Superotemporal migratoon of sphere implants
Cicatricial tissue in upper fornix
Damage to levator muscle or nerve

Question 14

Options for anophthalmic ptosis

Answer 14

Small amounts - prosthesis modification
Mild ptosis - Muller muscle - Conjunctival resection
Greater amounts - tightening of levator aponeurosis

Frontalis suspension is less useful because there is no visual drive

Question 15

Options for Lash margin entropion

Answer 15

Horizontal tarsal incision
Rotation of Lash margin
Splitting of eyelid margins at gray line

Question 16

Indications for exenteration

Answer 16

Some destructive tumors extending to orbit
Intraocular melanomas or RB extending outside globe
Malignant epithelial lacrimal gland tumors
Fungal infection/orbital mucormycosis
Sarcomas or primary orbital malignancies not responding to nonsurgical therapy

Question 17

Most common location of an orbital blowout fracture

Answer 17

Orbital floor medial to infra orbital nerve

Question 18

Ff structures compose the lateral retinaculum except

Lateral cantal tendon
Lateral horn of levator aponerosis
Lateral portion of Muller's muscle
Check ligament of LR
Fibers from Whitnall's ligament

Answer 18

Lateral portion of Muller’s muscle