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The Dictionary of Ophthalmic Optics

Refractive index. It affects the thickness and weight of the lens. The higher the index, the thinner and lighter the lens will be.

Increases the resistance of the lens to mechanical damage, e.g. scratches.

Increases the contrast and clarity of vision. It is the basic protection against the radiation of artificial light (monitors, LED etc.).

It reduces lens reflexes, i.e. light reflection on the surface of the lens.

Hydrophobic coating
A coating thanks to which the lens evaporates faster and water particles run off its surface.

Oleophobic coating
A coating that, by smoothing the lens surface as much as possible, prevents dirt, dust or dust from settling on it.

UV filter
Coating applied to the inside of the lens. Its purpose is to protect the eye from UV radiation from light coming from the side and back of the glasses.

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