Presbyopia is when your eyes gradually lose the ability to see things clearly up close. It’s a normal part of aging, usually noticeable around age 40. Your clear lens sits inside the eye behind your coloured iris and changes shape to focus light onto the retina so you can see. When you’re young, the lens is soft and flexible, easily changing shape. This lets you focus on objects both close up and far away. Although there’s no way to stop or reverse the normal aging process that causes presbyopia, the condition can be corrected with eyeglasses, contact lenses, or surgery.