Cataract operation, Persia, AD 1000. Reconstruction in the Lower Wellcome Gallery of the Science Museum, London. Cataracts have been treated surgically for more than 2000 years. This scene of eye-couching in 11th century Persia shows the surgeon pushing a needle into the eye. This moves the clouded lens aside, restoring vision if all goes well.
© Science Museum / Science & Society Picture Library