Choosing a frame is actually choosing the material of the frame. Common ones on eyeglass mart include sheet metal, TR90 (plastic titanium), alloys, titanium, and so on.

The board has high hardness, good gloss, and is not easily deformed; Ti-P/Ti-C: Ti is an identifier for materials containing titanium, where Ti-P represents pure titanium, Ti-C represents titanium alloys, and so on. The titanium frame is corrosion-resistant and lightweight, but its price is naturally high.

GF/GP: GF stands for the gold-plated frame, which is a mirror frame formed by welding thin gold sheets onto other metal substrates and rolling them; GP is a gold-plated frame, which uses electroplating to deposit gold on the surface of mirror frames made of other metals.

TR90 is a polymer material with memory properties, which is relatively lightweight, less than half the weight of the board frame. It can reduce the burden on the nose bridge and ears, making it more lightweight and comfortable to wear. The upgraded version is TR100.

Nowadays, it's usually resin sheets on eyeglass mart. Lenses are divided into spherical lenses and non-spherical lenses based on their curvature. For people with lower degrees, the difference between the two is not significant. For people with moderate to high myopia, it is recommended to choose non-spherical lenses for better imaging effects and clearer vision.

The dispersion coefficient is an indicator of the clarity of lens imaging, usually represented by the Abbe number (dispersion coefficient). The larger the value, the smaller the dispersion, and the better the imaging clarity. Of course, the price is also higher, so you can choose according to your affordability.

Simply put, at the same degree, the higher the refractive index, the thinner the lens. When selecting, the thinner the lens, the better. As long as the refractive index of the cheap eyeglasses near me lens is sufficient.