Glasses have always been the bain of old age and flying! By 45 I needed the chemist shop glasses to read the Jepps charts, by 55 I was stuffed and needed Tri-focals -( I no longer drive the big stuff thank Christ but the Tri's are still handy for driving& working on my private planes. Mine where from Specsavers and they called them industry glasses. Haven't been back for a few years so not sure if they still supply them?