(1) thin and light
The common refractive indices of CONVOX lenses are: 1.56, 1.59, 1.61, 1.67, 1.71, 1.74. Under the same degree, the higher the refractive index of the lens, the stronger the ability to refract incident light, the thinner the lens and the heavier the weight. Lightweight and more comfortable to wear.
(2) Clarity
The refractive index not only determines the thickness of the lens, but also affects the Abbe number. The larger the Abbe number, the smaller the dispersion. Conversely, the smaller the Abbe number, the greater the dispersion, and the worse the imaging clarity. But generally speaking, the higher the refractive index, the greater the dispersion, so the thinness and clarity of the lens often cannot be taken into account.
(3) Light transmittance
Light transmittance is also one of the factors that affect the quality of the lens. If the light is too dark, looking at things for too long will cause visual fatigue, which is not conducive to eye health. Good materials can effectively reduce light loss, and the light transmission effect is good, clear and transparent. Provide you with brighter vision.
(4) UV protection
Ultraviolet light is light with a wavelength of 10nm-380nm. Excessive ultraviolet rays will cause damage to the human body, especially the eyes, and even cause blindness in severe cases. At this time, the anti-ultraviolet function of the lens is particularly important. It can effectively block ultraviolet rays without affecting the passage of visible light, and protect eyesight without affecting the visual effect.
Post time: Jun-12-2023