If I listen at night and turn the lights off, I capture a surreal effect from my listening since I am concentrating less on my presence in a room in front of a stereo, and moreso as a member of a live audience. Effectively, when we lose one sense, our other senses are operating at a hightened state to compensate for the loss. Thus when we cannot see, our predominant sense, in this case our hearing, tries to convey to us what our eyes cannot. Our brain would not know that we were in front of a stereo rather than an stage had it not just registered via our sight and feeling that we had just entered our stereo room. Les, though you had not completely lost your sense of sight by removing your glasses, it is not surprising that a loss in vision clarity affects your perception of sound.