A retired surgeon has invented a new device made from waste wood and plastic which may help to prevent millions of people going blind.
Roger Armour, 74, is the inventor of the reasonable device, which can remarkably detect cataracts and other harmful eye problems.
According to Armour, the best thing about the creation is that it is very low-priced, and can help people in the third world countries.
The inventor said he made his prototype, called a slit lamp, on the kitchen table.
"It is remarkably good," Sky News quoted Armour, as saying.
"I'm delighted because I have seen so much suffering from awful eye diseases. I hope this instrument will help people in poor countries," he added.
A slit lamp is used in any High Street eye test. The patient rests their chin on a bar, while the optician shines a light into their eyes and examines them through a special lens. But the equipment costs around 10,000 pounds.
Armour made his version for 5 pounds, plus the cost of a camera to record images. For the creation, he used a torch, a pocket magnifying glass, lolly sticks and part of a plastic toothbrush.
Dr. Roger patented his invention and is currently looking for a manufacturer.