COA exam study (JCAHPO) Exam Prep
| Study Notes & Practice Tests
levator palpebrae superioris - correct answers ✔✔Muscle that elevates the lid
Sclera - correct answers ✔✔white opaque fibrous shell, main purpose is to protect eye
Cornea - correct answers ✔✔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 answers ✔✔The largest oil-secreting glands, which are
embedded in the posterior connective tissue substance of the lids
Corneal Epithelium - correct answers ✔✔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 answers ✔✔Part of the cornea that regenerates rapidly and
heals without leaving a scar.
Catherine Kariuki
, Bowman's membrane - correct answers ✔✔Consists of randomly oriented collagen
fibrils of greater periodicity then the underlaying stroma.
Bowman's membrane - correct answers ✔✔Acellular layer of cornea that has no
regenerative capabilities. Function is unclear.
Stroma - correct answers ✔✔Layer just under Bowman's membrane. Accounts for 90%
of corneal thickness and is composed of 78% water.
Descemet's membrane - correct answers ✔✔Layer of the cornea that is composed of
type III collagen, forms the basement membrane of epithelial cells.
Endothelium - correct answers ✔✔4-6um thick layer of the cornea made of 500,000
cells that maintains corneal deturgescence. No regenerative abilities.
Limbus - correct answers ✔✔The gray, semitransparent area which demarcates the
junction of the cornea and sclera.
Cornea is completely nourished by - correct answers ✔✔3 sources: A plexus of fine
capillaries at the limbus, the tear film, and the aqueous humor.
Vitreous - correct answers ✔✔jelly like structure, thick and viscous, that occupies the
vitreous chamber in the posterior concavity of the globe.
Lens - correct answers ✔✔A transparent biconvex structure situated between the iris
and the vitreous.
Catherine Kariuki
| Study Notes & Practice Tests
levator palpebrae superioris - correct answers ✔✔Muscle that elevates the lid
Sclera - correct answers ✔✔white opaque fibrous shell, main purpose is to protect eye
Cornea - correct answers ✔✔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 answers ✔✔The largest oil-secreting glands, which are
embedded in the posterior connective tissue substance of the lids
Corneal Epithelium - correct answers ✔✔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 answers ✔✔Part of the cornea that regenerates rapidly and
heals without leaving a scar.
Catherine Kariuki
, Bowman's membrane - correct answers ✔✔Consists of randomly oriented collagen
fibrils of greater periodicity then the underlaying stroma.
Bowman's membrane - correct answers ✔✔Acellular layer of cornea that has no
regenerative capabilities. Function is unclear.
Stroma - correct answers ✔✔Layer just under Bowman's membrane. Accounts for 90%
of corneal thickness and is composed of 78% water.
Descemet's membrane - correct answers ✔✔Layer of the cornea that is composed of
type III collagen, forms the basement membrane of epithelial cells.
Endothelium - correct answers ✔✔4-6um thick layer of the cornea made of 500,000
cells that maintains corneal deturgescence. No regenerative abilities.
Limbus - correct answers ✔✔The gray, semitransparent area which demarcates the
junction of the cornea and sclera.
Cornea is completely nourished by - correct answers ✔✔3 sources: A plexus of fine
capillaries at the limbus, the tear film, and the aqueous humor.
Vitreous - correct answers ✔✔jelly like structure, thick and viscous, that occupies the
vitreous chamber in the posterior concavity of the globe.
Lens - correct answers ✔✔A transparent biconvex structure situated between the iris
and the vitreous.
Catherine Kariuki
