High myopia, how to match thin glasses?

The most troublesome problem of high myopia is wearing a pair of heavy and thick glasses, which seriously affects the aesthetic degree, especially for some people who pay more attention to image, wearing heavy and thick glasses increases their sense of inferiority. So how can I pair a pair of glasses that at least look less heavy from the outside?

First of all, talk about the factors that affect the thickness of lenses:

1) frame size. Suppose the pupil distance of a customer is 60, and if the pupil distance of the frame (that is, the distance between the geometric centers of two pieces) is 70, dividing by 2 means that the center point will move 5 mm, and the centripetal movement is the factor that really determines the thickness in essence. The myopia film has a thin center and a thick edge. So the thicker the edge.

2) Pupil distance. Suppose that people with 70 and 68 pupillary distances on the shelf only have 1, and people with 58 pupillary distances have 6. The natural pupil distance is small and thick when other factors remain unchanged.

3) The degree is high or low. Everyone knows this and says nothing more.

4) refractive index. The general refractive index is 1.56, 1.60, 1.67, 1.74 (there are 1.7 1 in China). The bigger the number, the thinner the lens. Generally, -0.00-4.00 is suitable for 1.56, -3.00-6.00 is suitable for 1.60, -4.00-8.00 is suitable for 1.67, and it is suitable for 1.74 above. Of course, local tyrants can 65438+. The degree of -6.00 1.74 is generally 25-30% thinner than 1.56.

5) Frame materials. Plate and frame are generally thick, and metal materials are generally thin. Other factors being the same, it should be the same after actual processing, except that the thick plate material can cover part of the lens thickness and looks less thick.

6) If there is astigmatism, the closer the axial position is to 180, the thinner it is, and the axial position of high astigmatism of 180 has little effect on the thickness. But the people at the 90-axis position have a great influence on the thickness.

7) Round ones are thinner than square ones. Round ones don't have horns like square ones. If it is thickened, it will indeed look thinner, but it has little effect.

8) The size of the lens. If the border size is the same, the pupil distance is the same, but if the sheet is small. Just take a smaller lens part, and it will be thinner to grind.

9) Center thickness of lens: For safety reasons, the center thickness is not less than1.0mm.. If one manufacturer is 1. 1 and the other manufacturer is 1.2, the actual thickness of different lenses will be different. Consumers don't have to pay attention to this. Insiders need to know.

Q:

I am highly nearsighted. How to choose a thinner pair of glasses regardless of the wallet?

A:

1) If your pupillary distance is 66 and the size of the shelf is 66, it is the thinnest ideal, that is to say, the shelf should be small. If the pupillary distance is only 58, most people will pinch their faces when they choose a shelf of 58. We can only choose the smallest shelf without pinching our faces. People with high myopia, small pupil distance and big face are sad from the perspective of glasses.

2) The lens is made of 1.74 resin. The higher the refractive index, the thinner the lens. Of course, 1.9 glass is the thinnest, but the disadvantage of glass is that it is heavy, fragile and unsafe, so few people match it.

3) Please ask the machinist to repair the edge more, if it is more beautiful and thinner, the effect will be better. But it will be more obvious when you look at the white edge with more edges.