ABO Exam 2023-2024 Questions and Answers (Graded A)
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
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
