Lens Designs and Features | Essilor

Lenses and the Science Behind Them

There are Three Main Parts to a Lens:

Corrective Lenses

Normally, light rays bend (refract) evenly onto a small area of the retina to give a clear image. For people with refractive errors like myopia, hyperopia and astigmatism - the light is unable to focus on this area of the retina. Corrective lenses bend the light that passes through to the retina, adjusting its focus and enabling the wearer to see clearly again.

Matching Lenses to Eye Conditions

Different lenses are required for different eye conditions:

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