ABO Exam (2023 – 2024) Questions and Answers

Name the 3 types of tunics of the eye, and what areas of the eye they consist of. - 1. Fibrous: cornea and sclera (outer protective coating) 2. Vascular: iris, ciliary body and choroid (uveal tract) 3. Neural: retina During accommodation, what 3 things do the eyes do? - 1. Ciliary muscle relaxes allowing for thickening of crystalline lens 2. Eyes converge 3. Pupils constrict What happens with Aniseikonia? - The ocular image of an object with one eye differs in size/shape from the other eye; cannot fuse into one image. Difference between Anisemetropia and Antimetropia? - 1. Anisemetropia: refractive errors differ greatly, but same sign. 2. Antimetropia: signs in each eye is different; one plus one minus. What is diplopia? - Seeing double vision What do Iseikonic lenses do? - Manipulate image size when dissimilar sizes makes it difficult to fuse images. What is a scotoma? - A blind area of reduced vision in the visual field "Fusion" occurs where? - In the brain The aqueous fluid is continually being manufactured by