COT Surgical Assisting Procedures 3

Question 1

In the sterile surgical field, if the ophthalmic technician suspects an instrument has been contaminated, what is the correct action?

Accepted Answer

Remove it from the field and replace it with a sterile instrument

Answer

Any instrument suspected of contamination must be removed immediately and replaced to maintain sterile field integrity and prevent infection.

Question 2

Which viscoelastic agent is classified as a cohesive OVD and is preferred for maintaining anterior chamber space during IOL implantation?

Accepted Answer

Healon (sodium hyaluronate)

Answer

Healon is a cohesive OVD that forms a single mass, making it easy to maintain space and to remove completely after IOL placement.

Question 3

During a vitrectomy procedure, the technician must ensure the infusion line is connected before the surgeon begins. What is the primary reason for this safety step?

Accepted Answer

To maintain intraocular pressure and prevent globe collapse

Answer

The infusion line replaces vitreous volume as it is removed, maintaining IOP and preventing hypotony and retinal detachment.

Question 4

What is the purpose of performing a Seidel test intraoperatively after corneal wound closure?

Accepted Answer

To detect aqueous humor leakage through the wound

Answer

The Seidel test uses fluorescein dye to identify aqueous leakage; a streaming green fluorescence indicates a wound leak requiring additional sutures.

Question 5

When assisting during LASIK, which instrument is used to create the corneal flap in a microkeratome-based procedure?

Accepted Answer

Microkeratome with oscillating blade

Answer

In traditional LASIK, a microkeratome with an oscillating metal blade creates the hinged corneal flap prior to excimer laser stromal ablation.

COT - Certified Ophthalmic Technician Practice Test

COT - Certified Ophthalmic Technician Practice Test

COT Surgical Assisting Procedures 3