Ace the 2026 Equine Eye Mastery Challenge – Saddle Up for Clinical Ophthalmology Success!

Begin with a neutral lens setting. When using a direct ophthalmoscope, starting at zero diopters gives you an uncomplicated, baseline view of the retina with the simplest optical setup, making it easier to locate landmarks like the optic nerve and the red reflex without extra magnification pulling you away from the initial orientation. Once you’ve found the retina, you can fine‑tune by increasing or decreasing diopters in small steps to sharpen details. Positive diopters magnify and bring you closer to the eye, which helps when you’re ready to scrutinize a specific area, but they can make it harder to locate the retina initially if you’re not yet aligned. Negative diopters reduce magnification and shift the focal plane, which can push features out of view during the initial search. So, start neutral, then adjust as needed to achieve a clearer, more detailed view.