to permanent cornea scarring, scarring of the eye, loss of vision. reporter: this doctor has treated two teenage girls with serious eye problems just within the last month. there its nothing inherently wrong with these contacts, the question is are they the right size and shape for your eye. reporter: the doctor says every eye is a different shape. so plano contacts are not necessarily one size fits all. the wrong size could damage the eye. these colored contacts are very easy to get your hands on. they sell them at swap meets all over the state, you can get them on the internet, or you can even find them at a gas station like this. but few customers receive instructions on how to take care of their lenses. like the necessity of having clean hands and handling them, using saline solution instead of tap water and making sure you throw them away after you have worn them. eye doctors say they have plano lenses and will sell you a pair after you have had an eye exam. it may cost you