Read this and then go put in your contacts:
"A LEECH which had attached itself to an Australian woman's eyeball has been removed by doctors who had to think "outside the box".
The 66-year-old woman was gardening in the backyard of her suburban Sydney home in March last year, when she accidentally flicked some moist soil and the leech into her left eye.
Her husband then watched in alarm as the leech wriggled its way over her cornea, headed for safety and a feed via the eye's mass of delicate blood vessels."

via arbroath.blogspot.com