Full Guide: Low Vision and Diseases
Low vision refers to a condition in which the eyesight cannot be corrected by contacts or glasses but still has some sight. Low vision is not blindness, but it can be caused by limited sight in some areas. Low vision can include blurry vision, poor night vision, blind spots, and blurry vision. Age-related macular damage is one common reason for low vision. Low vision can be helped by visual aids, which are a cost-effective and convenient way to live with it.
What is a Low Vision?
Low vision refers to a visual impairment that can’t be corrected by prescription eyeglasses or contact lenses. Low vision does not necessarily mean that a person will go blind. However, they may still be able to see some things and can use visual aids to improve their sight.
Low vision or blindness refers to a decreased ability to see images clearly. There are many types of blindness. The American Optometric Association (AOA), distinguishes between low vision and blindness.
- “Partially-sighted”: A person who has vision impairments ranging from 20/70 to 20/200 when wearing regular prescription lenses.
- “Legally blind” refers to a person who has vision less than 20/200, with regular correction.
The ratio measurement measures the sharpness of vision 20 feet away from an object. If your vision is 20/70, then you need to be at least 20 feet from an object in order to see what someone with good eyesight can see at 70ft.
Causes of Low Vision
Low vision can be caused by many things. Low vision is most often caused by problems in the eyes or other health issues that affect the whole body. Age-related macular disease, diabetes, and vision impairment are some of the most common causes. Individuals with vision impairment may also be affected by cancer, albinism, and brain injuries. These disorders and those at high risk for them are more likely to experience vision impairment.
Diagnose Low Vision
Your low-vision specialist will perform a specialized eye examination to diagnose low vision. Your eye doctor should be consulted if you have difficulty with any activities, such as traveling, cooking, work, or school. To determine the severity of your condition, your doctor will conduct tests such as looking at your eyes under different lighting conditions. He or she may also give you magnifying glasses and charts to check your visual acuity, depth perception, visual field, and visual field.
Macular degeneration refers to a condition that affects your retina. This is the part of the eye that focuses on images. Blurred vision can result from the macula, which is responsible for central vision. Some people may experience blurred vision, while others might lose their central sight completely.
AMD (age-related macular degeneration) is typically broken down into two types: Dry AMD and Wet AMD. When abnormal blood vessels develop under the macula, this can lead to fluid and blood loss. Dry AMD, on the other side, is more gradual and progressive because it is not connected to abnormal growths.
A cataract is an eye clouding that affects the way light focuses on the retina. This clouding of the eye lens can cause vision loss by blocking light from reaching the retina. Cataracts can result from aging, UV exposure, or injury. A cataract can be removed if the eye is in good health. This usually makes the eye look better. To maximize vision, a person may need low-vision rehabilitation if they have other eye diseases.
Glaucoma occurs when fluid pressure increases in the eye and damages the optic nerve. This can be caused by fluid buildup or improper drainage. Most types of glaucoma do not have any symptoms, but the first signs are problems with peripheral vision and night vision. It can be treated early with medication or surgery, which may reduce vision loss.
Diabetic retinopathy is a condition where the blood vessels that supply the retina can develop abnormal branches and leak. This can cause vision problems and may eventually lead to irreparable damage to the retina. Although surgical procedures can slow down the progression of this condition, they can be reversed by controlling your blood sugar.
Retinitis Pigmentosa causes gradual loss of night vision and a significant reduction in inside vision. This is a hereditary condition that affects more children and adults than it does adults. The first sign, night blindness in childhood or adolescence, is usually the most obvious.