COA exam study (JCAHPO) Questions with
100% Correct Answers
levator palpebrae superioris Correct Answer: Muscle
that elevates the lid
Sclera Correct Answer: white opaque fibrous shell, main
purpose is to protect eye
Cornea Correct Answer: A transparent convex covering
which protects the eye and helps focus light rays onto
the retina and the back of the eye
meibomian glands Correct Answer: The largest oil-
secreting glands, which are embedded in the posterior
connective tissue substance of the lids
Corneal Epithelium Correct Answer: Part of the cornea
that is usually injured by superficial abrasions or small
foreign bodies. Is 5-7 cells thick and is composed of
nonkeratinized stratified squamous cells.
Corneal Epithelium Correct Answer: Part of the cornea
that regenerates rapidly and heals without leaving a
scar.
, Bowman's membrane Correct Answer: Consists of
randomly oriented collagen fibrils of greater periodicity
then the underlaying stroma.
Bowman's membrane Correct Answer: Acellular layer of
cornea that has no regenerative capabilities. Function is
unclear.
Stroma Correct Answer: Layer just under Bowman's
membrane. Accounts for 90% of corneal thickness and is
composed of 78% water.
Descemet's membrane Correct Answer: Layer of the
cornea that is composed of type III collagen, forms the
basement membrane of epithelial cells.
Endothelium Correct Answer: 4-6um thick layer of the
cornea made of 500,000 cells that maintains corneal
deturgescence. No regenerative abilities.
Limbus Correct Answer: The gray, semitransparent area
which demarcates the junction of the cornea and
sclera.
100% Correct Answers
levator palpebrae superioris Correct Answer: Muscle
that elevates the lid
Sclera Correct Answer: white opaque fibrous shell, main
purpose is to protect eye
Cornea Correct Answer: A transparent convex covering
which protects the eye and helps focus light rays onto
the retina and the back of the eye
meibomian glands Correct Answer: The largest oil-
secreting glands, which are embedded in the posterior
connective tissue substance of the lids
Corneal Epithelium Correct Answer: Part of the cornea
that is usually injured by superficial abrasions or small
foreign bodies. Is 5-7 cells thick and is composed of
nonkeratinized stratified squamous cells.
Corneal Epithelium Correct Answer: Part of the cornea
that regenerates rapidly and heals without leaving a
scar.
, Bowman's membrane Correct Answer: Consists of
randomly oriented collagen fibrils of greater periodicity
then the underlaying stroma.
Bowman's membrane Correct Answer: Acellular layer of
cornea that has no regenerative capabilities. Function is
unclear.
Stroma Correct Answer: Layer just under Bowman's
membrane. Accounts for 90% of corneal thickness and is
composed of 78% water.
Descemet's membrane Correct Answer: Layer of the
cornea that is composed of type III collagen, forms the
basement membrane of epithelial cells.
Endothelium Correct Answer: 4-6um thick layer of the
cornea made of 500,000 cells that maintains corneal
deturgescence. No regenerative abilities.
Limbus Correct Answer: The gray, semitransparent area
which demarcates the junction of the cornea and
sclera.
