The lenses are available in single vision, varifocal and sun-lens forms. They need to be sprayed with a chemical solution every week to keep the fog-repellent surface working.

这种镜片有单光、变焦、太阳镜三种形式，使用时需要每周在镜面上喷洒一种化学溶剂，才能保持防雾表面持续有效。

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In other words, the lenses would collectively form a single eye.

ECONOMIST: Brittlestar eyes

The skeletons of brittlestars, which are sea creatures related to starfish and sea urchins, contain thousands of tiny lenses that collectively form a single, distributed eye.

ECONOMIST: REPORTS

It said the advantages were brighter, clearer indoor images that would be less prone to blur caused by unsteady hands than some SLR (single lens reflex) cameras on the market which feature bigger and more expensive lenses.

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