Certified Ophthalmic Technician (COT) Practice Test 2026 - Free COT Practice Questions and Study Guide

Electrolysis is a method that uses electrical currents to permanently remove hair, including eyelashes, from the lid margin. This technique targets hair follicles with a fine probe, delivering a precise amount of heat to destroy the follicle's ability to grow hair. Because the procedure focuses on individual hair follicles, it can provide a permanent solution for unwanted eyelashes.

In contrast, while laser treatment can also be used for hair removal, it generally works best on thicker hair and may not be as effective for finer hair like eyelashes. Cryotherapy, which uses freezing temperatures, is typically utilized for treating certain skin conditions rather than for hair removal. Excision, while effective for removing tissue, does not effectively provide a method for permanent eyelash removal, as it would require significant surgical intervention and is not practical for this application. Thus, electrolysis stands out as the most suitable and effective method for the permanent removal of lashes from the lid margin.