Certified Ophthalmic Medical Technologist (COMT) Practice Exam

Which letters are referred to as "Sloan" letters?

1. ABCDEFG

2. DSRKVOHNZC

3. LMNOPQRST

4. UVWXYZ

The correct answer is: DSRKVOHNZC

The term "Sloan letters" refers specifically to a standardized set of letters designed for optometric visual acuity testing. These are letters that are easily recognizable and of uniform design, which helps in assessing visual acuity across diverse populations. The Sloan letters are primarily the following: C, D, H, K, O, R, S, T, U, V, Z. The correct answer includes the letters D, S, R, K, V, O, H, N, and Z, which represent a selection of these standard optotypes. These letters have been carefully chosen for their distinctiveness and ease of identification, contributing to their widespread use in clinical settings for vision tests. Their standardized visual angle also helps ensure that the test results are consistent and comparable. The other options include groups of letters that do not represent the standardized set used in optometry, further highlighting why the specific letters in the correct choice are favored for assessing visual performance.