For eight months, a 35-year-old man in India was bothered by his left eye. It was red and blurry. When he finally visited an ophthalmology clinic, it didn’t take long for doctors to unearth the cause.

If they make an incision in the eyeball, won't it leak? Do they plug it with some sorta glue or is the jelly just so viscous that a tiny incision is no problem? And how does the saline that was used ...