About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 86. Chapters: Braille, Blindness in literature, Guide dog, Diabetic retinopathy, Glaucoma, Cataract, GPS for the visually impaired, Retinitis pigmentosa, DAISY Digital Talking Book, Trachoma, Visual prosthesis, Braille literacy, Braille music, Recovery from blindness, Norrie disease, Retinopathy of prematurity, Optic nerve hypoplasia, Human echolocation, Grade 2 braille, Arnall Patz, Tactile paving, Coats' disease, Tactile graphic, Photokeratitis, Homonymous hemianopsia, Assistive Technology Industry Association, The Country of the Blind, Hebrew Braille, Nyctalopia, Tunnel vision, Canine glaucoma, Dancing Dots, Blindness and education, Vision loss, Randolph-Sheppard Act, Javits-Wagner-O'Day Act, Welding goggles, Vitelliform macular dystrophy, Sankara Eye Foundation, Flash blindness, Moon type, All India Chess Federation for the Blind, Blindfold, Lilli Nielsen, Sighted guide, Large-print, Bitemporal hemianopsia, Guide horse, Blindism, Binasal hemianopsia, Buphthalmos, Stereoblindness, Boston line letter, Mus e Valentin Ha y, Chess blindness, Cortical blindness, Assistive Media, Maculopathy, Intracortical visual prosthesis, Exudative vitreoretinopathy, Swedish Interactive Thresholding Algorithm, Accessible image, Orientation and mobility. Excerpt: Glaucoma is an eye disorder in which the optic nerve suffers damage, permanently damaging vision in the affected eye(s) and progressing to complete blindness if untreated. It is often, but not always, associated with increased pressure of the fluid in the eye (aqueous humour). The term 'ocular hypertension' is used for cases having constantly raised intraocular pressure (IOP) without any associated optic nerve damage. Conversely, the term 'normal' or 'low tension glaucoma' is suggested for the typical visual field defects when associated with a normal or low IOP. The nerve damage involves...
