Certified Ophthalmic Assistant Practice Exam

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Which cycloplegic agent is preferred for office use due to its rapid onset and short duration?

Atropine
Cyclopentolate
Homotropine
Scopolamine

The correct answer is: Cyclopentolate

Cyclopentolate is preferred for office use because it offers a rapid onset of action, typically starting within 30 to 60 minutes after administration, and a relatively short duration of effect, lasting about 6 to 24 hours. This makes it highly useful for procedures that require temporary paralysis of accommodation and dilation of the pupil without prolonged side effects, which can be disruptive for patients who are not undergoing extended treatments. In contrast, atropine has a much longer duration and can last for days, making it less practical for quick office procedures. Homotropine, while it does have a shorter duration than atropine, does not generally act as quickly as cyclopentolate. Scopolamine is more often utilized for its effects on motion sickness and is not typically used in ophthalmic exams. Therefore, the rapid action and manageable duration of cyclopentolate make it the ideal cycloplegic agent for outpatient settings.