Ophthalmology Board Practice Questions - Saudi Board Ophthalmology Final Written Exam

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A 24-year-old male presents with progressive visual blur in his left eye. Topography shows an asymmetric hourglass pattern with steepening of 49.5 D inferiorly. You plan to perform corneal collagen cross-linking (CXL). Which of the following matches the FDA-approved Dresden protocol for CXL?

Riboflavin 0.1% instillation every 2 minutes for 30 minutes, followed by UVA irradiation at 3 mW/cm² for 30 minutes Riboflavin 0.1% instillation every 5 minutes for 15 minutes, followed by UVA irradiation at 9 mW/cm² for 10 minutes Riboflavin 0.25% instillation every 2 minutes for 10 minutes, followed by UVA irradiation at 30 mW/cm² for 3 minutes Riboflavin 0.5% instillation every 1 minute for 5 minutes, followed by UVA irradiation at 1.5 mW/cm² for 60 minutes

Correct Answer:

Riboflavin 0.1% instillation every 2 minutes for 30 minutes, followed by UVA irradiation at 3 mW/cm² for 30 minutes

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