Why is darkness associated with dispair?
http://www.quotationsbook.com/quote/4385/
What causes blindness?
http://www.healthline.com/
What kind of dammage occurs in the eye to result in blindness?
http://www.who.int/blindness/causes/en/
Are there any treatments to regain eyesight?
http://www.who.int/mediacentre/factsheets/fs282/en/index.html
What aides are available?
http://www.nfb.org/nfb/Products_and_Technology.asp?SnID=1472720880
What is Braille all about?
http://www.ehow.com/how_2331077
http://www.brailleenterprises.com/whatis.htm
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