Vision and Hearing
Some of the visual changes associated with aging begin to unfold during middle age. One should have annual eye exam to check for pressure buildup in the fluid of the eye , or glaucoma, which must be treated to prevent blindness. Blurred detail vision for most is not a problem until sometime in the seventies or eighties, and this can be a sign of a cataract, or hardening of the lens of the eye so that it cannot accommodate as efficiently.