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Scientists have developed a new type of lens that creates multiple focal points, which could make for glasses or contacts that provide a clearer view over a range of distances. The secret? Making the lens a spiral shape.
A spiral-shaped lens that keeps a sharp focus at various distances and in diverse light situations has been created by researchers.
Eyewear could get a revamp after scientists invented a spiral-shaped lens, which spins light through it like water going down a drain.
<p>Researchers have developed a spiral-shaped lens that maintains clear focus at different distances in varying light conditions. The new lens , described in Optica, works much like progressive lenses used for vision correction but without the distortions typically seen with those lenses. It could help advance contact lens technologies, intraocular implants for cataracts and miniaturized imaging systems.</p>
Inscribing a spiral in the centre of a contact lens seems to create optical vortices that interact so that the lens provides a clear image of objects at all distances