ABO Exam Study Questions and
Answers5
Name the 3 types of tunics of the eye, and what areas of the eye they consist of. - ANSWERS-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? - ANSWERS-1. Ciliary muscle relaxes
allowing for thickening of crystalline lens
2. Eyes converge
3. Pupils constrict
What happens with Aniseikonia? - ANSWERS-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? - ANSWERS-1. Anisemetropia: refractive
errors differ greatly, but same sign.
2. Antimetropia: signs in each eye is different; one plus one minus.
What is diplopia? - ANSWERS-Seeing double vision
What do Iseikonic lenses do? - ANSWERS-Manipulate image size when dissimilar sizes makes it
difficult to fuse images.
, What is a scotoma? - ANSWERS-A blind area of reduced vision in the visual field
"Fusion" occurs where? - ANSWERS-In the brain
The aqueous fluid is continually being manufactured by what? - ANSWERS-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? - ANSWERS-Posterior chamber
The transparent, colorless mass of soft, gelatinous material which fills the eyeball behind the
lens is the: - ANSWERS-Vitreous humor
What is the index of refraction for parts of the eye: cornea, crystalline lens, aqueous humor,
vitreous humor. - ANSWERS-Cornea: 1.37
Crystalline lens: 1.42
Aqueous humor: 1.33
Vitreous humor: 1.33
Metric system: One meter is equal to... - ANSWERS-One meter= 39.37 inches (1 inch=25.24mm)
One meter=
10 decimeters or .1
100 centimeters or .01
1000 millimeters or .001
micro (millionth) or .000001
nanometers (billionth) or .000000001
1mm=1 million nanometers
Answers5
Name the 3 types of tunics of the eye, and what areas of the eye they consist of. - ANSWERS-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? - ANSWERS-1. Ciliary muscle relaxes
allowing for thickening of crystalline lens
2. Eyes converge
3. Pupils constrict
What happens with Aniseikonia? - ANSWERS-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? - ANSWERS-1. Anisemetropia: refractive
errors differ greatly, but same sign.
2. Antimetropia: signs in each eye is different; one plus one minus.
What is diplopia? - ANSWERS-Seeing double vision
What do Iseikonic lenses do? - ANSWERS-Manipulate image size when dissimilar sizes makes it
difficult to fuse images.
, What is a scotoma? - ANSWERS-A blind area of reduced vision in the visual field
"Fusion" occurs where? - ANSWERS-In the brain
The aqueous fluid is continually being manufactured by what? - ANSWERS-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? - ANSWERS-Posterior chamber
The transparent, colorless mass of soft, gelatinous material which fills the eyeball behind the
lens is the: - ANSWERS-Vitreous humor
What is the index of refraction for parts of the eye: cornea, crystalline lens, aqueous humor,
vitreous humor. - ANSWERS-Cornea: 1.37
Crystalline lens: 1.42
Aqueous humor: 1.33
Vitreous humor: 1.33
Metric system: One meter is equal to... - ANSWERS-One meter= 39.37 inches (1 inch=25.24mm)
One meter=
10 decimeters or .1
100 centimeters or .01
1000 millimeters or .001
micro (millionth) or .000001
nanometers (billionth) or .000000001
1mm=1 million nanometers
