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Lenses for High Myopes

Lenses for High Myopes Video

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Normally light is focussed by the cornea and the lens to form a sharp image on the Retina.
Sometimes the eye ball is too long and the light comes to a focus before the retina.
Lenses to correct this are thicker at the edges than in the middle.
In a stong prescription, the edges can be particularly thick and unsightly.
There are a number of ways to avoid this.
Choosing a small frame reduces the edge thickness and weight of the lens.
Lenses with a high "refractive index" also reduce the edge thickness and weight.
The third way is to use aspheric lenses which reduce the thickness further still.
Anti-reflection coatings can also improve the appearance and vision through the lenses.

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