COT Surgical Assisting Procedures 5

Question 1

In the ophthalmic OR, the technician is responsible for proper positioning of the operating microscope. Which adjustment ensures the surgeon has adequate working distance?

Accepted Answer

Adjusting the objective lens focal length and XY positioning

Answer

The objective lens determines the focal length (working distance), typically 175–200 mm, and must be positioned so the surgeon operates comfortably without postural strain.

Question 2

When a surgeon requests intracameral preservative-free lidocaine during cataract surgery, the technician draws it from a single-use vial because:

Accepted Answer

Preserved formulations are toxic to corneal endothelium

Answer

Benzalkonium chloride and other preservatives are cytotoxic to corneal endothelial cells; only preservative-free preparations are safe for intracameral injection.

Question 3

During glaucoma tube-shunt surgery, the technician should cover the tube with a patch graft to prevent which complication?

Accepted Answer

Tube erosion through the conjunctiva

Answer

Without a protective patch graft (pericardium, sclera, or cornea), the silicone tube can erode through the overlying conjunctiva, risking infection and endophthalmitis.

Question 4

Which action by the ophthalmic technician is appropriate when the surgeon calls for 'more viscoelastic' during IOL implantation?

Accepted Answer

Load a fresh viscoelastic cannula and hand it handle-first to the surgeon

Answer

A pre-loaded cannula handed handle-first maintains the sterile transfer technique and allows the surgeon to inject immediately without repositioning.

Question 5

After cataract surgery, the technician applies a patch and shield. The primary purpose of the rigid shield is to:

Accepted Answer

Protect the eye from external pressure and accidental rubbing

Answer

A rigid Fox shield deflects physical contact from pillows, fingers, or clothing, preventing accidental pressure on the fresh surgical wound.

COT - Certified Ophthalmic Technician Practice Test

COT - Certified Ophthalmic Technician Practice Test

COT Surgical Assisting Procedures 5