Comments about Canon Canon Diopter E +2.0 for FD & EOS Cameras (except EOS-3, A2/A2E, ELAN 7/7E, IX) & Digital SLR'S:
This corrective device will allow you to see the image that will be captured by the sensor without using eyeglasses. Just be careful when moving the camera in or out of a photo bag as it easily slides off and can be lost.