If you’re over 40 and your vision is starting to get fuzzy, you’re not alone:

“It happens to 100% of humans. I have never yet seen a patient who does not become presbyopic. That’s really the term that we use for that.”

Mayo Clinic Optometrist Dr. Muriel Schornack says it’s a gradual loss of your eye’s ability to focus on nearby objects. She says it’s caused by a hardening of the lens of your eye as you age. As your lens becomes less flexible, it can no longer change shape to focus on close-up images:

“It feels like you fall off a cliff. But this is really a process that’s been going on for a very long time.”

A basic eye exam can confirm presbyopia. Eyeglasses or contact lenses can correct the condition.