For what it's worth--I have had those thin clear parasites in my tear ducts-- and so far have not had any experience like that Indian woman did.
I also make sure to rinse my eyes with distilled water and Sea Salt -- or else canned saline solution. They dont have things like that over in India, and the conditions in most of India isnt very sanitary. If a person puts contaminated fingers in their eyes to rub them alot, the eye will get easily infected to begin with.
Especially places like Calcutta. Mother Teresa was a true saint--because she came from a very wealthy family to live permanently with these people--- in all the squalor. Cows and cow poop are all over their streets, and it gets pretty hot there too. Chickens live inside many of the homes with the people too.