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American Board of Opticianry ABO NOCE National
Opticianry Competency EXAM PREP 2025/2026
ACCURATE QUESTIONS WITH CORRECT DETAILED
ANSWERS || 100% GUARANTEED PASS <LATEST
VERSION>
fibrous tunic .......Answer.........consists of the sclera and the cornea
vascular tunic .......Answer.........consists of the iris, choroid, ciliary
body, responsible for nourishment nervous tunic
.......Answer.........the inner layer of photoreceptors and neurons
which consists of the retina rods and cones
.......Answer.........nervous tunic or neural layer contains the special
photo (light) receptors known macula
.......Answer.........approximately 120 million rods spread towards
the outside of the retina and about 6 million cones concentrated
near the center. where light will focus in a healthy eye
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fovea .......Answer.........e highest concentration of cones is found
at, center of the macula anterior chamber
.......Answer.........between the cornea and the
iris
posterior chamber .......Answer.........between the iris and the lens
vitreous chamber .......Answer.........found between the retina and
the lens and is filled with a thicker gel-like substance called
vitreous humor which maintains the shape of the eye cornea
.......Answer.........Light enters the eye through the transparent,
dome
epithelium .......Answer.........The cornea consists of five distinct
layers: 1. The outer most layer, rests on Bowman's membrane
Bowman's Membrane .......Answer.........2. The next layer, which
acts as a protective barrier stroma .......Answer.........3. between
the two membranes makes up
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90% of the thickness of the cornea
Descemet's Membrane .......Answer.........4. separates the stroma
and the endothelium endothelium .......Answer.........5. The inner
most layer, removes water from cornea, helping to keep the
cornea clear.
iris .......Answer.........amount of light allowed through the pupil is
controlled by, colored part of the eye
The iris has two muscles: 1. The dilator muscle
.......Answer.........opens the iris allowing more light in 2. The
sphincter muscle .......Answer.........closes the iris crystalline lens
.......Answer.........Just behind the pupil, purpose of the lens is to
focus light on the retina
accommodation .......Answer.........The process of focusing on
objects based on their distance ciliary body
.......Answer.........lens achieves accommodation with the help of
American Board of Opticianry ABO NOCE National
Opticianry Competency EXAM PREP 2025/2026
ACCURATE QUESTIONS WITH CORRECT DETAILED
ANSWERS || 100% GUARANTEED PASS <LATEST
VERSION>
fibrous tunic .......Answer.........consists of the sclera and the cornea
vascular tunic .......Answer.........consists of the iris, choroid, ciliary
body, responsible for nourishment nervous tunic
.......Answer.........the inner layer of photoreceptors and neurons
which consists of the retina rods and cones
.......Answer.........nervous tunic or neural layer contains the special
photo (light) receptors known macula
.......Answer.........approximately 120 million rods spread towards
the outside of the retina and about 6 million cones concentrated
near the center. where light will focus in a healthy eye
,Page 2 of 17
fovea .......Answer.........e highest concentration of cones is found
at, center of the macula anterior chamber
.......Answer.........between the cornea and the
iris
posterior chamber .......Answer.........between the iris and the lens
vitreous chamber .......Answer.........found between the retina and
the lens and is filled with a thicker gel-like substance called
vitreous humor which maintains the shape of the eye cornea
.......Answer.........Light enters the eye through the transparent,
dome
epithelium .......Answer.........The cornea consists of five distinct
layers: 1. The outer most layer, rests on Bowman's membrane
Bowman's Membrane .......Answer.........2. The next layer, which
acts as a protective barrier stroma .......Answer.........3. between
the two membranes makes up
, Page 3 of 17
90% of the thickness of the cornea
Descemet's Membrane .......Answer.........4. separates the stroma
and the endothelium endothelium .......Answer.........5. The inner
most layer, removes water from cornea, helping to keep the
cornea clear.
iris .......Answer.........amount of light allowed through the pupil is
controlled by, colored part of the eye
The iris has two muscles: 1. The dilator muscle
.......Answer.........opens the iris allowing more light in 2. The
sphincter muscle .......Answer.........closes the iris crystalline lens
.......Answer.........Just behind the pupil, purpose of the lens is to
focus light on the retina
accommodation .......Answer.........The process of focusing on
objects based on their distance ciliary body
.......Answer.........lens achieves accommodation with the help of
