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What is Presbyopia?
Every eye contains a small lens. In a young normal eye this lens focuses the light entering the eye
onto the retina and we can see near, intermediate, and distant.
As we age the lens begins to harden and loses the ability to focus from near to intermediate to
distance and back again. This is known as presbyopia and begins around the age of 40 years.
The earliest symptom is difficulty seeing things up close and bifocal or varifocal glasses become
necessary for some people to see clearly at all distances.