Simple answer--you want computer glasses Long answer: go to your eye doctor with a music stand and a score, set it up and have them make you a pair of test glasses using removeable lenses. Then have your eyes checked for rotation and astigmatism, and add that on top of the lenses. Do not use polycarbonate lenses due to angular distortion. For the very best lenses buy Zeiss lenses, Essilor is a less expensive alternative. Use a clear antireflective coating to reduce glare. Do lenses make a difference? Yes they do! But buy an inexpensive pair to try out before ordering expenive lenses, or go for the essilor. US and Canada residents can get good quality lenses at a reasonable price by oredering high index lenses at Costco. They aren't Zeiss, but they are good.
Alternative: have a bifocal made with the top 25-35 percent percent distance and the bottom 65-75 percent music if you regularly play in an orchestra and you need to see the conductor dt To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html
