Vision and Ophthalmology Surgical Procedures and Treatments 3

Question 1

Cycloablation procedures for refractory glaucoma target which structure?

Accepted Answer

Ciliary body (to reduce aqueous production)

Answer

Cycloablation (cyclodestruction) using laser or cryotherapy destroys ciliary body tissue to reduce aqueous humor production and lower IOP in refractory cases.

Question 2

The most common complication of trabeculectomy in the early postoperative period is:

Accepted Answer

Hypotony with shallow anterior chamber

Answer

Early postoperative hypotony (IOP too low) with a flat or shallow anterior chamber is the most frequent complication, caused by overfiltration or wound leak.

Question 3

Phakic intraocular lenses (pIOLs) are used in patients who:

Accepted Answer

Have high refractive error not suitable for LASIK with natural lens preserved

Answer

Phakic IOLs (e.g., Visian ICL) are implanted in front of or behind the natural lens to correct high myopia or hyperopia where corneal refractive surgery is contraindicated.

Question 4

During cataract surgery, the continuous curvilinear capsulorhexis (CCC) is performed to:

Accepted Answer

Create a round, controlled opening in the anterior capsule

Answer

CCC creates a smooth, circular anterior capsule opening that provides a stable rim for IOL centration and prevents radial capsular tears during nucleus removal.

Question 5

Glaucoma drainage devices (tube shunts) create an alternative outflow pathway by:

Accepted Answer

Routing aqueous from the anterior chamber to an external equatorial plate

Answer

Glaucoma drainage implants (e.g., Ahmed, Baerveldt) use a tube that shunts aqueous from the anterior chamber to an equatorial episcleral plate where it forms a bleb.

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Vision and Ophthalmology Surgical Procedures and Treatments 3