(CNN)For an entire week, the man had pain in his left eye as well as blurred double vision. Finally, the 48-year-old, who requested anonymity, visited National Taiwan University Hospital in Taipei.
Bungee cord to the eye causes man's iris to collapse
A brief physical examination by Dr. Wei Li Chen and Dr. Chia-Chieh Hsiao, physicians and researchers in the hospital's Department of Ophthalmology, revealed left eyelid bruising and an artfully, if painfully, distorted left pupil.
The eye's single opening, the pupil is an aperture through which light travels to reach the retina, a thin layer of tissue lining the back wall of the eye. The retina's photoreceptor cells convert light into signals sent to the back of the brain, where the vis