- Determine the size by comparing the cheapest eyeglasses online parameters:
Glasses are a standard product, and like clothes and shoes, they come in their own sizes.
The parameters of the size of the glasses are marked on the leg, the bridge of the nose or the label.
Frame size explanation:
- Frame size: the distance between the inner sides of the mirror circle at the midpoint of the plane vertical line where the frame is located. Generally, there are two methods of measurement, namely the box method and the reference line method, which are generally 33-- 60mm.
2, nose bridge size: the widest distance of the horizontal line where the nose bridge of the frame is located. It is generally 13-- 22mm.
3, the size of the mirror leg: from the center of the hinge to the end of the mirror leg, generally 125-- 156mm.
4, frame height: the widest outer distance between the upper and lower edges of the frame.
5, the outer width of the frame: the distance between the visible areas on the left and right sides of the frame, that is, the distance between the frame and the junction of the two mirror legs. According to the analysis of the proportion of face size and frame size, the outer width of the frame surface below 128mm is classified as small code, 129mm to 138mm is classified as medium code, and the above 139mm is classified as large code.
6, the inner width of the frame: the distance between the inner legs of the two mirrors 60mm after the plane of the mirror ring. This is just the contact point between the mirror leg and the temple of the human body. If it is too tight or too loose here, it will affect the wearing comfort. At the same time, the inner width of the frame will also change with the adjustment of the mirror leg.
It is recommended that you learn the size of the frame that is suitable for you in the following ways:
- Check the parameters of the glasses (usually marked on the inside of the mirror leg);
If your parameters have been worn, you can use a ruler to measure the fitted glasses to get data;
- Try it on at an optician's and note down the size that suits you.
Second, if you know your pupil distance Pupil distance refers to the distance between the pupil centers of the two eyes when the two eyes are facing or parallel. The purpose of measuring pupil distance in optometry is to make the optical center distance of the equipped lens match the pupil distance, so as to ensure that the eye can see through the optical center. Therefore, pupil distance plays an important role in selecting a suitable frame, and the width of the frame should be proportional to the distance between the two pupils. Make sure that when wearing glasses, the pupil should be in the center of the frame and lens. To wit:
- Horizontal position: The horizontal position of the pupil in the eyeglass frame should be located near the geometric center of the frame.
2, vertical position: the edge of the lower eyelid should be basically located in the vertical center of the frame.
