The Discovery Fund For Eye Research is holding a 10-day auction where fans can bid on the eyewear of various celebrities. The Fund researches vision-threatening diseases of age-related macular degeneration, keratotoconus, ocular infections and diabetic retinopathy, and works to improve the diagnosis and treatment of these diseases.

Tim McGraw donated an autographed poster for the auction, LeeAnn Rimes and George Strait have offered signed photos and Randy Travis has donated an autographed picture and a pair of sunglasses to the cause.

So many stars have donated so many items -- you can check out the list for yourself at http://discoveryfund.org/auctionupdate.html.