I've gotten to the point where I can see really well close up as long as I'm not wearing my glasses or contacts. If I'm wearing my contacts and need to read something small, I have to put on a pair of reading glasses over my contacts. Stinks getting older...
But you won't really see enough of a difference in a 5 degree difference in any of your angles. The guy who drills my stuff has MO's highest certification, and he starts to explain a few of the adjustments you can make, like if your angles put you drilling through part of the pin, they recommend moving it a certain distance, which will affect the angles. If you're bowling tournaments on sport patterns and need to match up to the pattern to maximize results, yes, you should get your angles dialed in as much as possible. But if you're bowling league on a house pattern, it's not going to make nearly as much difference. You'll have enough forgiveness in the pattern to make up for a slight variance in drill angles. Surface is much more important for that.
Experience is something you get immediately after you need it most
Bowl up a Storm!