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How to Select the Right Frame Size for Glasses
- The importance of eyeglass frame size is often overlooked
- The size of the frame is usually marked like 50□20-140 on the glasses. What does this mean? So, What frame size fits you?
- Appropriate glasses should make the pupil basically in the center of the lens
- Simply: pupillary distance = glasses bridge + single lens width
- pupillary distance = distance between the center of right lens to the center of left lens
- The larger lens has a higher error tolerance rate, but the smaller lens has a very low error tolerance rate and must be basically in the center of the lens.