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COA Exam Study Set 2 (JCAHPO) – Questions/Answers
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COA Exam Study Set 2 (JCAHPO) – Questions/Answers
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COA Exam Study Set 2 (JCAHPO) – Questions/AnswersLevator palpebrae superioris Right Ans - Muscle that elevates the lid
Sclera Right Ans - white opaque fibrous shell, main purpose is to protect
eye
Cornea Right Ans - A transparent convex covering which protects the eye
and helps focus light rays onto the retina and the back of the eye
meibomian glands Right Ans - The largest oil-secreting glands, which are
embedded in the posterior connective tissue substance of the lids
Corneal Epithelium Right Ans - 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 Right Ans - Part of the cornea that regenerates rapidly
and heals without leaving a scar.
Bowman's membrane Right Ans - Consists of randomly oriented collagen
fibrils of greater periodicity then the underlaying stroma.
Bowman's membrane Right Ans - Acellular layer of cornea that has no
regenerative capabilities. Function is unclear.
Stroma Right Ans - Layer just under Bowman's membrane. Accounts for
90% of corneal thickness and is composed of 78% water.
Descemet's membrane Right Ans - Layer of the cornea that is composed of
type III collagen, forms the basement membrane of epithelial cells.
Endothelium Right Ans - 4-6um thick layer of the cornea made of 500,000
cells that maintains corneal deturgescence. No regenerative abilities.
Limbus Right Ans - The gray, semitransparent area which demarcates the
junction of the cornea and sclera.
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