While low vision or legal blindness can be limiting, there are many resources and tools to help you live your life with the utmost independence. Depending on the cause of your vision loss, you may be able to benefit from eye exercises and strategies to participate in daily activities. You may also find it helpful to use a stick, talking calculator, special computer software, and other products to help people who are legally blind. Rare genetic diseases that affect the retina can also lead to blindness. For example, retinitis pigmentosa can cause «tunnel vision» in which only a tiny window of central vision remains. These patients could read letters in 20/20 format, but would be legally blind due to the poor field of vision. The retinal gene therapy developed at the University of Pennsylvania`s Scheie Eye Institute was recently approved by the FDA for a form of inherited retinal disease called Leber`s congenital amaurosis. Treatment involves injecting normal copies of the RPE65 gene into the retina of patients born with mutations in this gene. Further research should lead to gene therapy for other forms of inherited and acquired eye diseases. Glaucoma accounts for 9-12% of all cases of blindness and is characterized by high pressure in the eyeball. Constantly high intraocular pressure can damage the optic nerve and lead to visual disturbances. The government uses the term «statutory blindness» to decide who can receive certain benefits, such as disability or vocational training.
This is not the same as being completely blind. The most common causes of visual impairment and blindness worldwide include untreated correction of defective vision, cataracts, glaucoma and corneal opacities caused by infections and injuries caused by infections and injuries caused by infections and injuries caused by infections and injuries caused by trachoma infections and injuries. In the United States and most other developed countries, the four most common causes of blindness are age-related macular degeneration, cataracts, diabetic retinopathy, and glaucoma. Glaucoma is the leading cause of irreversible blindness in African Americans. Other causes of blindness include inflammatory diseases such as optic neuritis, inherited degenerations such as retinitis pigmentosa, retinopathy of prematurity (formerly called retrolental fibroplasia) in premature infants, vascular disease, ocular neoplasms such as retinoblastoma or optic glioma, and blood vessels blocked at the visual pathway due to stroke. Being considered legally blind means you can`t drive in any state. Talk to your doctor about your concerns. According to the American Foundation for the Blind, legally blind is not the same as completely blind, which is used to describe the inability to see anything with both eyes. Most people who are legally blind have some eyesight. Normal visibility is 20/20.
This means that you can clearly see an object from 20 feet away. If you are legally blind, your vision is 20/200 or less in your best eye or your field of vision is less than 20 degrees. That is, if an object is 200 feet away, you must stand 20 feet away from it to see it clearly. But a person with normal vision can stand at 200 feet and see this object perfectly. Assistive technologies can help improve the remaining vision of legally blind people. Through the use of advanced technologies, users benefit from significantly improved visual acuity, which supports activities of daily living. eSight is specially designed for visually impaired people, including the blind, to improve their eyesight and lead normal lives. It has helped improve vision in people with more than 20 different eye conditions, including macular degeneration, Stargardt disease, diabetic retinopathy and more. An estimated 2.2 billion people worldwide suffer from some degree of blindness, about half of which is due to preventable or treatable causes.
«Legally blind» is the definition of blindness used by the United States Social Security Administration (SSA) to determine whether a person is eligible for disability benefits, tax exemptions, and training for the visually impaired. Another way of looking at it: if someone with 20/20 vision is standing next to a legally blind person, the legally blind person should approach up to 20 feet to see an object from 200 feet away, as well as the person with normal vision. Treatment is also available for many eye conditions that usually do not cause vision problems, such as dry eyes, conjunctivitis, and blepharitis, but cause discomfort and pain.