Why do older people have weak eye sight?

Age-related macular degeneration (AMD)

AMD is a condition that gradually destroys the macula, the central part of the retina. The macula is responsible for sharp central vision, which is needed for activities like reading, driving, and recognising faces. AMD is the leading cause of vision loss in people over the age of 50.

Cataracts

Cataracts are a clouding of the lens of the eye. They can cause blurry vision, glare, and difficulty seeing in low light. Cataracts are very common in older adults, and they are the leading cause of blindness worldwide.

Glaucoma

Glaucoma is a condition that damages the optic nerve. It is usually caused by increased pressure in the eye. Glaucoma can lead to gradual vision loss, and it is a leading cause of blindness in people over the age of 60.

Diabetic retinopathy

Diabetic retinopathy is a condition that damages the blood vessels in the retina. It is a complication of diabetes. Diabetic retinopathy can lead to blurry vision, floaters, and vision loss. It is a leading cause of blindness in people with diabetes.

Other causes of vision loss in older adults

In addition to the conditions listed above, there are a number of other factors that can contribute to vision loss in older adults. These include:

Certain medications

Nutritional deficiencies

Medical conditions, such as stroke, Parkinson's disease, and multiple sclerosis

Head injuries

Exposure to ultraviolet radiation

Smoking

Obesity

If you are over the age of 50, it is important to have regular eye exams to check for any signs of vision loss. Early detection and treatment can help to preserve your vision.