Certified Ophthalmic Medical Technologist (COMT) Practice Exam

What procedure is commonly performed to lower intraocular pressure in patients with acute CRAO?

1. Laser trabeculoplasty

2. Paracentesis of anterior chamber

3. Surgical iridectomy

4. Phacoemulsification

The correct answer is: Paracentesis of anterior chamber

Paracentesis of the anterior chamber is commonly performed in cases of acute central retinal artery occlusion (CRAO) to lower intraocular pressure. This procedure involves inserting a needle into the anterior chamber of the eye to remove aqueous humor. By doing this, the volume of fluid in the eye is reduced, which can subsequently decrease intraocular pressure. This is particularly important in patients with CRAO, as elevated intraocular pressure can further compromise retinal perfusion and worsen ischemic damage. Other procedures mentioned, such as laser trabeculoplasty, surgical iridectomy, and phacoemulsification, serve different purposes. Laser trabeculoplasty is generally used for treating glaucoma by improving aqueous outflow, not for acute pressure reduction in CRAO. Surgical iridectomy is more often performed to treat or prevent angle-closure glaucoma, rather than to address acute CRAO. Phacoemulsification is a cataract surgery technique that removes the lens, and its primary goal is not related to intraocular pressure management in the context of acute CRAO. Therefore, paracentesis is the most appropriate and commonly performed procedure to address the specific needs of patients experiencing acute CRAO.