The material of the frame directly affects the comfort and durability of the eyeglasses online. Common materials include plastic, metal, and titanium alloy. Plastic frames are lightweight and affordable, while metal frames are more sturdy and appear high-end and atmospheric.

In addition, it is important to choose the appropriate style based on your face shape and skin tone and pair it with economical and suitable frame glasses.

The lens is the core part of eyeglasses online, and its material and function directly affect visual quality and comfort. Common lens materials include resin and glass, among which resin lenses are lighter and less prone to breakage. In terms of functionality, you can choose coating functions such as anti-fog, anti-scratch, and anti-blue light according to your own needs.

The light transmittance of a lens is a very important indicator, which mainly measures the transmittance performance of the lens to visible light, that is, the ratio of the amount of visible light passing through the lens to the amount of visible light projected on the surface of the lens. The high or low light transmittance directly affects the clarity of the lens and the visual experience of the wearer.

Generally speaking, the higher the light transmittance, the better the transmittance performance of the cheapest eyeglasses onlinelens, and the wearer will see a clearer and brighter scene. This is also the fundamental reason why high transmittance lenses can provide a better visual experience in sunny or dimly lit environments.

The refractive index is an important parameter of the lens, which determines the thickness and weight of the lens. For people with higher refractive index, choosing lenses with higher refractive index can make them thinner and lighter, and reduce the pressure on the eyes.