Exam (elaborations)
NAO BOOK 1 EXAM QUESTIONS AND ANSWERS
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NAO BOOK 1 EXAM QUESTIONS AND ANSWERS...
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Reflex tears - ANSWER Produced by lacrimal glands & are caused bystimulus such as coughing, sneezing, strong smells & emotions
Layers of tear film (outer-innermost) - ANSWER Lipid, aqueous, mucin
Tear lake, tear prism, tear meniscus - ANSWER Collection of the thin film of
tears on the lower lid margin
Ectropia - ANSWER Eyelids turn outward
Entropion - ANSWER Eyelids turn inward
Conjunctiva - ANSWER Mucous membrane lining lids & globe
Goblet cells - ANSWER produce mucus
Conjunctivitis - ANSWER inflammation of the conjunctiva
First tunic (outer tunic) - ANSWER Sclera, cornea, limbus
2nd tunic (middle tunic) - ANSWER Sclera-retina (iris, ciliary body, choroid)
, 3rd tunic (inner tunic) - ANSWER Retina
Outer tunic - ANSWER Fibrous; receives O2 from tears and blood vessels
Layers of the cornea (outermost-innermost) - ANSWER Epithelium,
Bowman's layer, stroma, descements membrane, endothelium
Epithelium - ANSWER Has 5-7 layers
Bowman's layer - ANSWER If damaged, scar tissue will form
Endothelium - ANSWER If deprived of O2, will lost cells quickly & cause
swelling
Average power of the cornea - ANSWER 42.00-45.00 diopters
Canal of Schlemm - ANSWER Surrounds the lumbar region; where aqueous
drains into the trabecular meshwork
Middle tunic - ANSWER vascular
Inner tunic - ANSWER Light sensitive
Anterior chamber - ANSWER Back surface of the cornea & the iris
Posterior chamber - ANSWER Between the iris and crystalline lens
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