Abstract: An adjustable retainer for eyeglasses that have a pair of temple bars. The retainer includes two cords of preferably the same length, one of which is attached to the right temple bar and the other of which is attached to the left temple bar. In one embodiment, the cords are attached by inserting a loop in the end of the cord partially through a hole in the end of the temple bar, and then passing the tail end of the cord through the loop and pulling the cord to tighten the loop around the temple bar. In another embodiment, two elastic cords, each having an enlargement at one end, are pulled through their respective temple bar holes so that the enlargement is held against the outer surface of the hole. In both embodiments, the tail ends of the cords are inserted through a cord holder, which is preferably a cord lock, and secured together to form a stop for the cord holder.