Presbyopia is an impairment of vision due to advancing years. It affects everyone sometime after the age of 40. As the eye ages, the lens becomes less flexible and can no longer easily focus on near objects or small print. Cataracts are thickened, hardened and cloudy parts of the eye lens. The cloudy lens blocks or distorts light coming into the eye and blurs vision.
Cataracts usually develop in both eyes and develop at different rates.
It is an eye disorder caused by increased pressure within the eyeball. If the pressure is not relieved it can result in blindness. It is caused by damage or breakdown of the macula, the part of the retina that provides clear, sharp central vision. It may occur in one or both eyes. Diabetic retinopathy is a possible complication of diabetes.