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Blindness (Vision Impairment): Symptoms, Types, Causes and Treatment

Eyes Posted by Crystal L.

Types of Blindness

  • Partial Blindness: You can still see if you are partially blind. It’s commonly referred to as “low vision.”
  • Complete Blindness: You are completely unable to perceive or understand light. This illness is quite unusual.
  • Congenital Blindness: that was present at birth is referred to as congenital blindness. The causes include non-inherited birth abnormalities and hereditary eye and retinal disorders.
  • Legal blindness: occurs when your best-seeing eye’s central vision is 20/200 even after being corrected with glasses or contact lenses. Having 20/200 vision means that in comparison to someone with 20/20 vision, you need to be 10 times closer or an object needs to be 10 times larger in order to see it. Additionally, if your field of vision or peripheral vision is significantly diminished (less than 20 degrees), you may be considered legally blind.
  • Nutritional blindness: This phrase refers to eyesight loss brought on by a lack of vitamin A [1]. This type of blindness can also make it harder to see at night or in low light because the retinal cells are not functioning as effectively. If the vitamin A deficit persists, damage to the front surface of the eye (xerophthalmia) can result.

Consider color blindness, which is different from blindness in the conventional sense. This problem is also known as a color deficit. You have a different way of seeing colors. This disorder can be inherited or developed as a result of sickness or harm to your retina or optic nerve. You have achromatopsia if you can only see in black, white, or different degrees of gray.

You could also hear the terms avoidable or preventable blindness. These words describe blindness that affects people who have treatable conditions but never receive medical attention. Lack of access to eye care or medical treatment frequently causes this to occur. For instance, diabetes-related retinopathy may develop in persons who never get treatment for the condition. Without treatment for their hypertension [2], people may develop hypertensive retinopathy.