Did you know: human eye can change its focus up to 50 times per second.

Changing Focus: The human eye can change its focus up to 50 times per second. It is a remarkable piece of machinery that adapts to changing conditions in real time. One of its most impressive abilities is quickly and accurately changing its focus, allowing us to easily see objects at different distances.
This ability is controlled by the ciliary muscles, which alter the lens’s shape to adjust the eye’s focus.

Aging
The ciliary muscle weakens with age, which can lead to presbyopia, a condition that makes it harder to focus on objects that are close or far away.

Hmmm. Guess my cillary muscle weakening. Damn aging.

The more you know..