Your blind spots aren't in the middle of each eye. They're offset or else you wouldn't see what you're looking directly at. You wouldn't be able to read. In fact, the center of your eye is the fovea which has the highest density of cones in the eye.

https://en.m.wikipedia.org/wiki/Fovea_centralis

The blind spot is where the optic nerve enters your eye.

There are online tests that show you where your blind spots are. It works even on your phone, but you have to hold your phone just 3-4 inches from your nose, not the 10-12" like on a monitor. It's fun to see the circle completely disappear.

https://lasikofnv.com/blog/try-these-three-fun-tests-to-find-your-visual-blind-spot/

I get visual migraines and the onset of one presents as a blind spot right in the center of my vision, and I can't read. It's interesting to watch it evolve and see what my brain fills it in with. At first it just looks like your regular blind spots. My brain fills it in with surrounding colors, but as it expands and moves off to the side, it becomes a shimmering, crystalline, spiral rip in the universe.