The factors that affect the thickness of discount prescription glasses lenses are not just the lenses themselves, but a combination of multiple factors. The higher the degree, the thicker the lens. The lower the refractive index of the lens, the thicker the lens. (Therefore, it is recommended to purchase lenses with high refractive index for height measurement)

The size of the discount prescription glasses frame, as the lens is thin in the middle and thick on both sides, the larger the frame, the thicker the lens appears. The difference between pupillary distance and frame, greater the difference between pupillary distance and frame, the more lens displacement, and the thicker the lens.

When fitting lenses, there are 1.56/1.61/6/67/1.74 lenses, which refer to the refractive index of the lens. The higher the refractive index, the thinner and lighter the lens, and the higher the price. However, relatively speaking, the hardness of the lens will be lower.

Generally, the appropriate refractive index is recommended based on your degree, so when matching lenses, the more expensive the lens, the better.

The composition of glasses consists of two parts: the frame and the lens. In terms of the lens, choosing the appropriate refractive index makes the lens thinner and lighter in weight. In terms of the frame, you can choose an ultra-light discountglasses frame.

Don't choose glasses frames that are too large, because nearsighted lenses are thin in the middle and thick at the edges. The larger the frame, the larger the lens, and the thicker and heavier the lens at the edges. Therefore, the secret to choosing ultra-light glasses is to have a small and lightweight frame with a high refractive index.

Applying a lens film is to improve the transparency of the lens and processes it. Green film is the most widely used film layer.