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Temple spread is the measurement of the horizontal width between the inner surfaces of the spectacle frame temples (arms) when they are fully open. This measurement determines how tightly or loosely the frame grips the wearer's head.
read more about temple spread in eyewear frames ...The correct temple spread is important for comfort. If the spread is too narrow, the arms will pinch the sides of the head, causing discomfort and headaches. If the spread is too wide, the glasses will fall down the nose easily or sit crookedly on the face.
Opticians adjust temple spread by gently bending the temple arms outward (to widen the spread) or inward (to narrow the spread). This adjustment must be done carefully, using heat for plastic frames and specialized pliers for metal frames, to avoid breaking the hinge or temple arms.
Frame width is the total distance from the outer edge of the frame front. Temple spread is the width of the arms when they are open. While related, temple spread specifically relates to the pressure applied to the head for stability, while frame width is about the aesthetic size.
The correct temple spread makes your backup glasses comfortable. A perfectly spread frame provides a secure, lightweight feel that prevents the frames from slipping. This security is appreciated when your eyes are tired and you switch from contacts to glasses.
Temple spread is adjustable on most metal and acetate frames, but adjustment is minimal on rigid plastic frames.
No, the spread measurement is based on the wearer's head width and should not change in adulthood.
Yes, a common adjustment is to bend the arms inward slightly to increase the pressure and stop the frames from falling off.
If your glasses are constantly sliding down your nose, your temple spread may be too wide. Chronic sliding can lead to "optical decentration," meaning you aren't looking through the correct part of the lens. See your optician for a professional horizontal adjustment.
The Vision Council. Frame Maintenance Guide (thevisioncouncil.org). 2024.
ABDO. Fitting Spectacle Temples (abdo.org.uk). 2024.
Review of Optometry. Troubleshooting Frame Fit (reviewofoptometry.com). 2023.
All About Vision. Why Glasses Slide Down Your Nose (allaboutvision.com). 2024.