The size of the frame
For example: 55, 17— 140c2.
55 represents the maximum width of the mirror ring, in millimeters;
17 represents the shortest distance between two lens rings, and is also often called the width of the nose width (nose pad spacing) of glasses 17 mm.
140 represents the length of the temple. It should be noted that this length is calculated by straightening the temples. If you look from the side of the face, it is the fixed distance from the lens to the ear plus the ear hook plus the end of the temple.
C2 stands for color number.
? Extended data
Cleaning and maintenance of spectacle frames
1, ultrasonic cleaning, vibration to remove the dirt inside, the general optical shop has this service, basically free.
2. The lens groove of Quan Huafu spectacle frame is dirty. You can unscrew the screw yourself, take off the lens and clean it with a paper towel.
3. If the screw is loose, please take it to the optical shop and tighten it in time, otherwise the lens will easily fall to the ground and break. Don't handle it at will
4. Cosmetics containing chemical components, such as cosmetics or beauty agents, are easy to fade glasses frames. Please clean it with a special cloth or paper for glasses.
Most glasses are gently folded from the left temple first. If folded from the right, the frame itself will be unbalanced and skewed, and it will be very uncomfortable after wearing it.