What is presbyopia? What causes it?
· Decreased near vision· Stiffening of lens with age- need convex reading glasses
Presbyopia is a condition that affects people as they age, and it is characterized by a gradual loss of ability to focus on nearby objects. It usually occurs in people aged 40 or older and affects both eyes. Presbyopia occurs due to changes in the lens of the eye, which becomes less flexible over time and loses its ability to focus on close objects.
The process of focusing on objects involves the ciliary muscle, which controls the shape of the lens in the eye. This muscle contracts to thicken the lens when we focus on nearby objects and relaxes when we focus on distant objects. As we age, the ciliary muscle weakens, and the lens becomes more rigid, making it harder to focus on nearby objects.
Other factors that may contribute to the development of presbyopia include genetics, certain medications, and medical conditions such as diabetes or multiple sclerosis. Additionally, people who engage in prolonged near work, such as reading or computer use, may experience earlier onset of presbyopia.
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