The dispersion coefficient is an important indicator for measuring the imaging quality of the cheapest eyeglasses lenses for people with high myopia, usually represented by the Abbe number.
The smaller the frame size, the higher the refractive index of the lens, and the thinner the lens. The higher the refractive index, the thinner the lens and the more expensive the price.
High myopia must choose a comfortable cheapest eyeglasses frame. The issue of alcohol content and the advantage of online stores is their affordability. Buying glasses is not just about buying frames ➕ Lens. I can help you choose a suitable prescription and a suitable frame.
If you want to pair a pair of lightweight glasses, you must carefully consider it. Ultra-thin lenses+≠ Ultra-thin glasses. Fitting a pair of ultra-thin glasses is a systematic process that involves many factors. Don't just focus on the lenses.
Pairing lenses with the highest refractive index may not necessarily result in thin and lightweight glasses. If it is impossible to choose between thickness and precision, it is recommended that friends with high myopia should choose precision.
Try to choose the cheapest eyeglasses frame with a frame width and center beam width that is closest to your pupil distance. What are frame width and center beam width? The value of this temple is 54+18=72. If your pupillary distance is around 70, it is very close. From a thickness perspective, this is an ideal frame.
However, there is a prerequisite here, which is that you must wear a face plate, so trying it on is very important. Trying it on can also experience the whole process.
The weight ratio of the frame is very, very important to feel the final weight pressing on the nose bridge!