• vision faqs
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Ectasia is defined as the expansion of body tissue, in this case the cornea which is the clear dome covering the coloured part of the eye.  The cornea’s primary responsibility is to focus light onto the retina to create clear, sharp vision.  When the cornea thins, or becomes ectactic, it distorts the vision causing blur, multiple images, glare, haloes, dry eyes, light sensitivity and other undesirable visual phenomena.

see the duette difference video

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