ABO Exam QUESTIONS AND ANSWERS| 100% CORRECT
Name the 3 types of tunics of the eye, and what areas of the eye they consist of. Correct 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? Correct Answer: 1. Ciliary muscle
relaxes allowing for thickening of crystalline lens
2. Eyes converge
3. Pupils constrict
What happens with Aniseikonia? Correct 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? Correct 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? Correct Answer: Seeing double vision
What do Iseikonic lenses do? Correct Answer: Manipulate image size when dissimilar sizes
makes it difficult to fuse images.
What is a scotoma? Correct Answer: A blind area of reduced vision in the visual field
"Fusion" occurs where? Correct Answer: In the brain
The aqueous fluid is continually being manufactured by what? Correct 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? Correct Answer: Posterior chamber
The transparent, colorless mass of soft, gelatinous material which fills the eyeball behind the lens
is the: Correct Answer: Vitreous humor
What is the index of refraction for parts of the eye: cornea, crystalline lens, aqueous humor,
vitreous humor. Correct Answer: Cornea: 1.37
Crystalline lens: 1.42
Aqueous humor: 1.33
Vitreous humor: 1.33
Metric system: One meter is equal to... Correct Answer: One meter= 39.37 inches (1
inch=25.24mm)
Name the 3 types of tunics of the eye, and what areas of the eye they consist of. Correct 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? Correct Answer: 1. Ciliary muscle
relaxes allowing for thickening of crystalline lens
2. Eyes converge
3. Pupils constrict
What happens with Aniseikonia? Correct 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? Correct 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? Correct Answer: Seeing double vision
What do Iseikonic lenses do? Correct Answer: Manipulate image size when dissimilar sizes
makes it difficult to fuse images.
What is a scotoma? Correct Answer: A blind area of reduced vision in the visual field
"Fusion" occurs where? Correct Answer: In the brain
The aqueous fluid is continually being manufactured by what? Correct 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? Correct Answer: Posterior chamber
The transparent, colorless mass of soft, gelatinous material which fills the eyeball behind the lens
is the: Correct Answer: Vitreous humor
What is the index of refraction for parts of the eye: cornea, crystalline lens, aqueous humor,
vitreous humor. Correct Answer: Cornea: 1.37
Crystalline lens: 1.42
Aqueous humor: 1.33
Vitreous humor: 1.33
Metric system: One meter is equal to... Correct Answer: One meter= 39.37 inches (1
inch=25.24mm)
