Fortunately, I can do most mechanical work with my eyes closed. Having done it for so long I can tell from feel alone the difference in shim thickness and if it is a washer or spacer. Seeing double up close means I often turn my head and use feel. I've been wearing bifocals for over ten years now and they are still a trade off. I wear long distance contacts when motorcycle riding and flying. At home, a giant computer screen set on magnify is the ticket. A few years back, I wired up the house with a few miles of CAT6. Punching down those wires was a nightmare. Glasses off, held up an inch from my face to figure out the color code. For me, the worst part is reading. I used to be able to sit down and read for hours. Now I am lucky to read a few pages before my head hurts and my vision goes kerfluey. Boo hoo, poor me - Ha!I feel your pain, i have one eye going south,not looking forward to bifocals,being a mechanic with the bottom being the readers i cant imagine what im going to do when im working overhead with a vehicle on the hoist. Looks like i need two or three pairs to look at what im doing.
Have magnifier in my welding helmet, it helps.
You'll get used to working by feel. It negates the need for a work light. Think positive!