Wombat baby by Matt Wright (2 images)

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Testing your eyesight by having to read from a wall chart could become a thing of the past thanks to a revolutionary gadget that allows you to check whether you need glasses from the comfort of your own home.

Since 1862 opticians have assessed whether people are long or short sighted by asking people to read letters of gradually decreasing size.

But a new £24 device which attaches to your smartphone does away with the chart and the need to see an optician for...
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