I recently got a pair of glasses and researched a lot about glasses-related knowledge. From being a novice to being able to independently match eyeglasses online and choose glasses that suit oneself!
Perform optometry, and the data for optometry should include pupillary distance, myopia degree, astigmatism degree, and astigmatism axis. The principle of fitting is to achieve the best vision with the smallest degree, and the height needs to be carefully selected to determine the most comfortable degree to wear.
First, choose the lenses, then choose the frame. The most important purpose of wearing the cheapest eyeglasses is for your eyes to see the bright world, followed by whether they look good or not. So we choose high-quality lenses first when fitting glasses.
Choose the refractive index of the lens based on the degree of myopia. The higher the refractive index of the lens, the thinner it is. Thin means light, and at the same time, the higher the price.
Nowadays, most lens materials are made of lightweight resins and nonspherical surfaces. This spherical surface can be selected in the following way: double nonspherical surface>single nonspherical surface>spherical surface. The higher and thinner the refractive index of the lens, the better, and the clarity or Abbe number should also be considered.
You can choose the discountglasses frame that comes with the lenses, or you can customize it yourself. Then choose a frame based on your face shape, myopia degree, and pupillary distance, and try to choose a frame with a smaller height.
The three factors that affect the thickness of lenses are the refractive index of the lens<pupillary distance size<frame size. So the size of the frame is very important, so when it comes to height, it's better to choose the frame of your size.
