How far behind the top of the ear should the temple extend?

How far behind the top of the ear should the temple extend?

• A. 20 mm
• B. 40 mm
• C. 60 mm
• D. 10 mm

Answer: (B)

When evaluating how a temple should fit, the important idea is that the part of the temple that goes behind the ear needs to wrap securely around the head to keep the glasses in place. About 40 millimeters behind the top of the ear is a common target. This length lets the temple rest comfortably in the groove behind the ear, helping the frame stay put during movement and distributing weight so there aren’t pressure points. If the extension is too short, the glasses are more likely to slide forward or sit unstable on the nose. If it’s too long, the temple can press behind the ear or along the side of the head, causing discomfort or an awkward fit. Individual variation exists, but the 40 mm guideline is a solid standard for stable, comfortable wear.

When evaluating how a temple should fit, the important idea is that the part of the temple that goes behind the ear needs to wrap securely around the head to keep the glasses in place. About 40 millimeters behind the top of the ear is a common target. This length lets the temple rest comfortably in the groove behind the ear, helping the frame stay put during movement and distributing weight so there aren’t pressure points.

If the extension is too short, the glasses are more likely to slide forward or sit unstable on the nose. If it’s too long, the temple can press behind the ear or along the side of the head, causing discomfort or an awkward fit. Individual variation exists, but the 40 mm guideline is a solid standard for stable, comfortable wear.