The crystalline lens inside the eye changes its shape in response to the ciliary body. This change in shape occurs as a result of the lens' inrinsic elasticity. When we are born, the lenses are extremely elastic and readily change their shape.
There is not a consensus on why presbyopia occurs. Most believe presbyopia develops as a result of the hardening of the crystaline lens of the eye.
There are many surgical and non-surgical ways to treat presbyopia, which include:
Continue learning more about presybopia (reading vision).

