You've come to the right place if you're looking for a lot of job opportunities. Lead technicians are needed in several industries, which means your job outcome is looking pretty good. What you do as a lead technician will depend entirely upon what industry you decide to go into.
As a lead technician, you probably want to make sure you have good vision. So maybe you don't have 20/20 vision (only 35% of people actually do), but you'll at least need to be able to see what you're doing. Especially if you're going to be handling calipers, guages, or even inspection fixtures.
Education isn't necessarily a big thing when it comes down to being a lead technician. In fact, most employers are just interested in whether you have experience or not. With a high school degree, you could become a lead technician. You just need some experience under your belt.