WRT the slide being difficult to rack, if I'm reading your post correctly there was a round in the chamber or partly in the chamber. What cartridges were you using? It sounds like an out of spec cartridge was stuck in the chamber. If you did 20 rounds before it happened, it doesn't sound like a tight chamber... but I could be wrong. If you oiled the rails, it's unlikely that a lack of lube was your problem. I use high temperature wheel bearing grease on my 1911 rails and they all function fine.
WRT your eyesight and the front sight. I ordered a set of protective glasses from SSP Eyewear that have the corrective bifocal lens inset at the top of the lenses. That allows the shooter to keep their head in a normal position and not tilt up to use the bifocal lens. They have them in different diopter values. Mine are +1.25 and the set includes clear, smoke and amber lens that interchange on the frame. They offer different values, of course. They were in my mailbox within three days after ordering. sportsman
WRT your eyesight and the front sight. I ordered a set of protective glasses from SSP Eyewear that have the corrective bifocal lens inset at the top of the lenses. That allows the shooter to keep their head in a normal position and not tilt up to use the bifocal lens. They have them in different diopter values. Mine are +1.25 and the set includes clear, smoke and amber lens that interchange on the frame. They offer different values, of course. They were in my mailbox within three days after ordering. sportsman
