Which vision disorder is characterized by pressure on the optic nerve from elevated Intraocular pressure (IOP)?
Glaucoma
Cataracts
Retinal detachment
Retinoblastoma
The Correct Answer is A
A. Glaucoma:
Glaucoma is caused by increased IOP, which damages the optic nerve, leading to vision loss.
B. Cataracts:
Cataracts involve clouding of the lens, not elevated pressure or optic nerve damage.
C. Retinal detachment:
Retinal detachment involves the separation of the retina from underlying tissue, usually resulting from trauma or degeneration, not from pressure.
D. Retinoblastoma:
Retinoblastoma is a malignant tumor of the retina, typically seen in children, unrelated to IOP.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Glaucoma:
Glaucoma is caused by increased IOP, which damages the optic nerve, leading to vision loss.
B. Cataracts:
Cataracts involve clouding of the lens, not elevated pressure or optic nerve damage.
C. Retinal detachment:
Retinal detachment involves the separation of the retina from underlying tissue, usually resulting from trauma or degeneration, not from pressure.
D. Retinoblastoma:
Retinoblastoma is a malignant tumor of the retina, typically seen in children, unrelated to IOP.
Correct Answer is C
Explanation
A. Alkalosis and insomnia:
Alkalosis does not trigger sickling; acidosis (low pH) is more harmful. Insomnia alone is not a direct trigger.
B. Reduced stress and warm environmental temperature:
Reduced stress and warmth help prevent crises rather than cause them.
C. Acidosis and dehydration:
Acidosis promotes sickling of RBCs, and dehydration increases blood viscosity, both triggering vaso-occlusive crises.
D. High fat diet and hyperoxia:
A high-fat diet is linked to cardiovascular disease, and hyperoxia (excess oxygen) is not a trigger for sickling.
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