Many of us with less-than-perfect vision fantasize about waking up one morning able to see perfectly. Wish no more: There are contact lenses that claim to shape the lens of your eye while you sleep, eventually giving nearsighted people perfect vision (a remedy that’s significantly less sci-fi than a telescope implanted in the eye).
Nearsightedness occurs when the eye focuses light in front of the membrane at the back of the eye called the retina, instead of on it, usually due to an elongated eyeball. The eyeglasses or contacts that combat this condition work by diverging incoming light, which is then converged by the wearer’s eye.
The corrective contacts, called i-GO Overnight Vision Correction, reportedly work by gently reshaping your eye’s lens. A columnist in The Guardian wrote about his experience trying them out:
I begin with a sight test, then [optician Kieran] Minshull takes a topography of my eye, photographing the curvature of my cornea to obtain the measurements needed to make the lenses….
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