Presbyopia is a vision condition in which the crystalline lens of your eye loses its flexibility, which makes it difficult for you to focus on close objects. It is a progressive disease that is brought on by aging.
A common symptom is blurred vision at what would be a normal reading distance. Eyestrain brings about corresponding eye ache and headache, especially after reading or any other work that is close up.
Glasses, contacts, and surgery are treatment options for presbyopia.