Mahmood Choudhury is offering an unusual out-of-home ad location: contacts. His advertiseonmyeyes.com gives companies an eye-catching advertising opportunity –- literally. Their logo is placed onto a removable contact lens that is worn on his eyes. With prices starting from just £1000 a day, one-week minimum, slots can be pre-booked or purchased directly through Choudhury's Web site or via bidding on his eBay auction page. Companies will pay to have a small logo of their brand placed directly onto a contact lens. Advertisers choose where the logo will appear -- pupil, iris, sclera on one eye or both eyes.