I am among those who have to wear glasses when observing. I have heard a lot said about the need for long eye-relief, but I was wondering if the optical quality of glasses has any effect.
Will all the obsessing about optical quality in our instruments be for nothing if at the last moment the light has to travel through a sub-standard lens in our glasses?
For example, when I got my glasses some years ago I had the choice of getting some kind of coating applied that reduced diffraction I think. I didn't get the coating and now when I look at bright lights I get radiating spikes bouncing all over the place.
Are there better types of glasses than others? What about contact lenses?
Thanks a lot.
Jared.