As most people age they will experience some degree of vision loss. While some aging adults start losing the ability to see things far away, it's not uncommon for people between the ages of 41 and 60 to have problems seeing things up close as well. This condition is called presbyopia, or farsightedness.

Here are some more eye conditions that cause vision loss.

1. Macular Degeneration

According to the American Macular Degeneration Foundation (AMDF), this eye condition usually occurs in adults that are 55 years and older. This eye condition affects more than 10 million people in the United States, which makes it the most common cause of vision loss. This condition occurs when the middle part of the retina begins to deteriorate.

One of the first symptoms of macular degeneration is that straight lines appear distorted in the field of vision. Other symptoms include a need for brighter lighting, blurred vision, and a reduction in central vision. These symptoms, along with vision loss, become most noticeable during the late stages of macular degeneration.

2. Cataracts

Adults in their 40s and 50s usually have cataracts, but this eye condition doesn't start affecting their vision until they are 65 or older. Cataracts occur when the clear lens of the eye starts to become cloudy. This cloudiness causes vision loss, which becomes worse over time. Along with cloudy vision, other symptoms of cataracts include reduced night vision, double vision, and seeing halos around lights.

Treatment for cataracts involves a simple procedure where the cataract is removed and replaced with an intraocular lens. After this procedure, vision becomes normal again. Unfortunately, there are many countries that do not have this treatment available, which is why cataracts is the most common cause of blindness in the world.

3. Diabetic Retinopathy

Diabetic retinopathy is an eye condition that affects adults of all ages. According to the American Diabetes Association, this eye condition can affect adults as young as 20 years old, if they have diabetes. This is due to the fact that too much sugar in the blood damages the retina. Common symptoms of diabetic retinopathy include seeing floaters or dark spots in the field of vision, as well as trouble focusing, and blurred vision.

Once diabetic retinopathy begins to cause vision loss, it is not possible to regain vision. Treatment for this eye condition focuses on slowing the progression of vision loss. Treatment options include injections or laser surgery. The best way for diabetics to reduce their chances of diabetic retinopathy is to control their blood sugar levels.