What is presbyopia?
Presbyopia is a common type of vision disorders that onset at early 40s. It is often referred to as the aging eye condition. Presbyopia results in the inability to focus up close, a problem associated with accomodation in the eye.
Causes and Risk Factors
How does presbyopia occur?
Presbyopia happens naturally in people as they age. The eye is not able to focus light directly on to the retina due to the hardening of the natural lens. Aging also affects muscle fibers around the lens making it harder for the eye to focus on up close objects. The ineffective lens causes light to focus behind the retina, causing poor vision for objects that are up close.
When you are younger, the lens of the eye is soft and flexible, allowing the tiny muscles inside the eye to easily reshape the lens to focus on close and distant objects.
The cornea and lens bend (refract) incoming light rays so they focus behind the retina.
Who is at risk for presbyopia?
Anyone over the age of 35 is at risk for developing presbyopia. Everyone experiences some loss of focusing power for near objects as they age, but some will notice this more than others.