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Transcript of Blindness
imaging, or genetic studies. Legal blindness can be classified as vision rated as 20/200 or worse. http://www.wrongdiagnosis.com/symptoms/blindness/symptom-search.htm http://www.massgeneral.org/children/adolescenthealth/articles/aa_blindness.aspx http://www.medicinenet.com/blindness/page4.htm 90% of those considered to be legally blind have some vision or what some would call "low vision". The remaining 10% have complete blindness and experience complete darkness Another Classification of legal blindness is having a field of view less than 20 degrees as opposed to the norm of 180 degrees. Due to the many causes of blindness there is no one way to correct it Treatment regarding the specific conditon causing blindness will likely correct vision. many conditions, for example diabetic retinopathy or stroke leave permanent damage and could cause permanent blindness However refractive and eye defects like cataracts or macular degeneration can be fixed with corrective surgery or in minor cases, eyeglasses when one is faced with permanent blindness there are a number or ways of coping and increasing quality of life. for those faced with sudden or gradual onset of blindness the transission can be difficult. A reorganization of a persons habits may be required. A variety of tools are available to allow those who are blind to do many everyday tasks 90% of all bllindness is preventable through regular eye exams,
proper diet, access to medical care, and eye protection However the term blindness is used today to describe a variety of severe visual impairments 40 million people are blind worldwide 1.cataracts (47.9%)
3.age-related macular degeneration (8.7%)
4.corneal opacity (5.1%)
5.diabetic retinopathy (4.8%)
6.childhood blindness (3.9%)
8.onchocerciasis (0.8%) -finding light to be too bright or dim
-difficulty recognizing people
-squinting or disorientation In perspective that means someone who is legally blind and make out an object at 20 feet where someone with 20/20 could see with the same quality 200 feet