If you wear reading glasses all the time you tend to cause accidents, i.e. everything beyond the front of your car bonnet is pretty invisible.
The problem I have is lack of accomodation, so all I need are inexpensive reading glasses and can generally manage for most of each day without them, I do attempt to keep them with me by either pushing them back over my head but forget they are there and a) crush them against solid objects damaging my head. b) feel them flying off when up a ladder and dissapearing under a pile of junk, etc., or had them on a cord and tried to hang myself.
Much of the damage to the glasses was therefore caused by me 'wearing' them. Anyway its hereditary, many of my forebears were great reading glass manglers as well.
Back in the days when the odd tyranosaurus could still be found, I did use ground glass to focus some of my early cameras, the floating frames on crf cameras and later the magnificent viewfinders on the OMs compared to the gritty glass on an early Exactas etc., convinced me that the days of peering at a flat bit of glass were over, and I have no great desire to go back to those days.
Anyway back to the matter in hand, I have owned Rollei, Meopta, Practica, Minolta, Konica, Ilford, Kodak, Polaroid, Voiglander, Zorki, Agfa, Yashica cameras amongst others over the ages, and they have either ceased camera manufacture or had their names licensed by very different organisations. Minolta perhaps lives on inside Sony, but we have been seeing the photographic 'pond' drying up for some years, Olympus just being the latest, perhaps.