American Board of Opticianry (ABO) Practice Test 2026 – The All-in-One Guide to Master the American Board of Opticianry Exam!

The Snellen test is used to measure visual acuity, not screen for color blindness. The Amsler grid is used for detecting central visual field defects, which are not indicative of color blindness. The visual field test is used to detect peripheral vision issues, again unrelated to color blindness. The Ishihara test is specifically designed to screen for color blindness by presenting images with hidden numbers or patterns that only those with normal color vision can see.