The change of light's speed when it enters an optical material creates a reflection; the higher the refractive index, the greater the reflection.
It is well known that AR enhances vision since, by reducing reflections, it increases the transmission of light through the lens. However, the lower the reflection, the more visible are dirt and defects on the lens and the more difficult it is to keep the lens looking clean, so there must be some compromise.
The negative aspects of AR used to be its susceptibility to scratches, poor adhesion and difficulty to clean, but modern technology has surmounted these problems. Today, with modern application methods, there is virtually no reason not to include AR. |
