Which statement about the use of prescription glasses to maintain VLOS is accurate?

• A. Prescription glasses cannot be used to maintain VLOS
• B. Prescription glasses may be used to maintain VLOS
• C. Prescription glasses require a waiver
• D. Prescription glasses may be used to maintain VLOS safely

Answer: (D)

The key idea is that vision correction can be used to safely maintain visual line of sight. If you need prescription glasses to see clearly, you should wear them during flight because being able to see the drone and its surroundings clearly is essential for safe operation. Prescription glasses help you meet that visibility requirement, and they do not require a waiver just for wearing them. Since wearing the glasses improves your ability to keep the aircraft in sight and avoid hazards, the statement that they may be used safely to maintain VLOS is the most accurate.