ABO Exam 2024 Latest Update!!

Name the 3 types of tunics of the eye, and what areas of the eye they consist of. - ANSWER 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? - ANSWER 1. Ciliary muscle relaxes allowing for thickening of crystalline lens 2. Eyes converge 3. Pupils constrict What happens with Aniseikonia? - ANSWER 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? - ANSWER 1. Anisemetropia: refractive errors differ greatly, but same sign. 2. Antimetropia: signs in each eye is different; one plus one minus. What is diplopia? - ANSWER Seeing double vision What do Iseikonic lenses do? - ANSWER Manipulate image size when dissimilar sizes makes it difficult to fuse images. What is a scotoma? - ANSWER A blind area of reduced vision in the visual field "Fusion" occurs where? - ANSWER In the brain The aqueous fluid is continually being manufactured by what? - ANSWER The ciliary body The space between the back of the iris and the front of the lens which is filled with aqueous is the what? - ANSWER Posterior chamber The transparent, colorless mass of soft, gelatinous material which fills the eyeball behind the lens is the: - ANSWER Vitreous humor What is the index of refraction for parts of the eye: cornea, crystalline lens, aqueous humor, vitreous humor. - ANSWER Cornea: 1.37 Crystalline lens: 1.42 Aqueous hum During accommodation, what 3 things do the eyes do? - ANSWER 1. Ciliary muscle relaxes allowing for thickening of crystalline lens 2. Eyes converge 3. Pupils constrict