Certified Paraoptometric (CPO) Practice Exam 2025

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What is the onset time for Tropicamide?

  1. 10-20 minutes

  2. 20-40 minutes

  3. 40-60 minutes

  4. 60-90 minutes

The correct answer is: 20-40 minutes

Tropicamide is a commonly used medication for pupil dilation during eye examinations. The onset of action for Tropicamide typically occurs within 10 to 20 minutes after application, allowing for rapid facilitation of the dilated fundus examination. This quick onset is advantageous for both practitioners and patients, as it minimizes waiting times in the clinic. The duration of dilation effects can vary, but it's essential to recognize that the correct timeframe for onset is indeed 10 to 20 minutes. This means that while the selected answer indicates a longer timeframe of 20 to 40 minutes, the actual onset is on the shorter side, making it an efficient option for achieving mydriasis in a clinical setting. Understanding the pharmacokinetics of Tropicamide can help optimize patient care and streamline examination processes.