What is presbyopia?
Presbyopia is the medical term for your eye losing the ability to change its focus. This affects how well you can see close-up objects. It occurs as your eye’s natural lens grows less flexible with aging.

Presbyopia generally starts to develop around age 40 and gets worse until your mid-60s. You’ll notice that reading or other close-up tasks are harder than they used to be. You might need to hold your book or phone out at arm’s length to see the words clearly. You may also have symptoms like headaches or sore, tired eyes.

Presbyopia is part of the natural aging process, and it’s not a disease. It’s a common type of refractive error that eye care specialists can easily correct with glasses, contacts or surgery.

What causes presbyopia?
Age-related changes to your eyes cause presbyopia. During the first few decades of life, your eye’s lens is soft and flexible. It easily changes its shape when you shift your vision from something far away to something close-up. This ability (accommodation) allows light to land on your retina so you can see objects clearly.

As you get older, your lens grows less flexible and has trouble focusing light as it should. This leads to symptoms of presbyopia that begin in your 40s and level off in your mid-60s.

What are the symptoms of presbyopia?
The main signs and symptoms of presbyopia include:
+ The need for more light when you’re reading.
+ Blurred vision at a normal reading distance.
+ The need to hold reading material at arm’s length.
+ Headaches from doing close work.
+ Eye strain, which makes your eyes feel sore or tired.

Prevention
Can I prevent presbyopia?
You can’t prevent presbyopia since it’s a part of the natural aging process. But you can take steps to protect your eye health. Tips include:
+ Wear sunglasses to shield your eyes from harmful ultraviolet (UV) rays.
+ Eat foods rich in nutrients that promote eye health, including vitamin A, vitamin C, vitamin E and lutein.
+ Learn about computer vision syndrome and make adjustments to your routine to ease eye strain.

For more information here.