Übersicht			Auf mobile öffnen

Lieferstatus:	i.d.R. innert 5-10 Tagen versandfertig
Veröffentlichung:	April 2012
Genre:	Sprache
ISBN:	9781156765579
EAN-Code:	9781156765579
Verlag:	Books LLC, Reference Series
Einband:	Kartoniert
Sprache:	English
Dimensionen:	H 246 mm / B 189 mm / D 6 mm
Gewicht:	186 gr
Seiten:	86
Zus. Info:	Paperback
Bewertung:	Titel bewerten / Meinung schreiben

Inhalt:

Source: Wikipedia. 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, Musée Valentin Haüy, 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 loss of retinal ganglion cells in a characteristic pattern. There are many different sub-types of glaucoma but they can all be considered a type of optic neuropathy. Raised intraocular pressure is a significant risk factor for developing glaucoma (above 21 mmHg or 2.8 kPa). One person may develop nerve damage at a relatively low pressure, while another person may have high eye pressure for years and yet never develop damage. Untreated glaucoma leads to permanent damage of the optic nerve and resultant visual field loss, which can progress to blindness. Glaucoma can be divided roughly into two main categories, "open angle" and "closed angle" glaucoma. Closed angle glaucoma can appear suddenly and is often painful; visual loss can progress quickly but the discomfort often leads patients to seek medical attention before permanent damage occurs. Open angle, chronic glaucoma tends to progress at a slower rate and the patient may not notice that they have lost vision until the disease has progressed significantly. Glaucoma has been nicknamed the "silent thief of sight" because the loss of vision normally occurs gradually over a long period of time and is often only recognized when the disease is quite advanced. Once lost, this damaged visual field cannot be recovered. Worldwide, it is the second leading cause of blindness. It is also the leading cause of blindness among African Americans