Although the cornea can theoretically be scratched or abraded during eyelid surgery, changing of corneal shape and double vision are not consequences of this problem. A corneal abrasion is extremely painful until it heals; the problem is usually self resolving in 12-24 hours. Double vision can result from injury to one of the extra-ocular muscles, most notably the inferior oblique in lower eyelid surgery. However, this is a rare complication and is usually self limiting. I recommend that you see an Ophthalmologist as soon as possible.