About the Abbe number

important optical factors

Lenses with different refractive index are made of different optical materials. They will have different physical properties, and there is one parameter that few people pay attention to: Abbe number

Abbe number is a physical number used to describe the chromatic aberration of light in a medium, which directly affects the clarity of vision. The higher the Abbe number, the lower the chromatic aberration when light passes through the lens. This means the better the clarity of vision. The Abbe number of plastic lenses is generally between 30 and 60. .

Adopting a high Abbe number materials for the same optical design will theoretically provide clearer vision. Most people can't tell the difference. However, for some patients who can tell the difference, you should choose a lens with a high Abbe number.

The relationship between refractive index and Abbe number.