Will nearsightedness and farsightedness cancel each other out as you age?

In general, myopia and hyperopia do not cancel each other out with age. The detailed explanation is as follows:

Myopia and hyperopia are both types of refractive errors, representing two completely opposite refractive states. They cannot occur simultaneously in the same eye and therefore do not offset each other. In myopia, after refraction by the cornea and lens, light focuses in front of the retina rather than directly on it, resulting in a blurred image on the retina and decreased vision. Hyperopia is precisely the opposite—light focuses behind the retina after refraction, which also leads to blurred vision. Both conditions require corrective lenses to improve visual acuity. Myopic individuals need concave lenses, which artificially shift the focal point backward onto the retina.

It's important in daily life to correct poor eye-use habits, maintain good eye hygiene, and prevent eye infections, all of which can help prevent the progression of myopia or hyperopia.