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Aids Aids
Astigmatism Astigmatism
Averted vision care Averted vision care
Cataract surgery
Cataract surgery
Causes for Cataract Causes for Cataract
Chromatic andaptation of the eye

Chromatic andaptation of the eye

Classification of Glaucoma Classification of Glaucoma
Color Vision in normal eyes Color Vision in normal eyes
Conventional surgery Conventional surgery
Degree of Myopia Degree of Myopia
Diagnosis on Glaucoma Diagnosis on Glaucoma
Diseases caused by Optical nerves Diseases caused by Optical nerves
Elements & Enzymes Elements & Enzymes
Legal Blindness Legal Blindness
Peripheral Vision Peripheral Vision
Few important information on Glaucoma Few important information on Glaucoma
Blindness Blindness
Night Blindness Night Blindness
General information on Cataract General information on Cataract
Genetic defects in Blindness Genetic defects in Blindness
How Aqueous humour is produced? How Aqueous humour is produced?
How the Fovea centralis works? How the Fovea centralis works?
How the vision of the eyes maintained? How the vision of the eyes maintained?
How to do Eye examination? How to do Eye examination?
How Visual impairment caused? How Visual impairment caused?
Intervention of Human Brain in Color vision Intervention of Human Brain in Color vision
Ophthalmic astigmatism Ophthalmic astigmatism
Perimetry eye care and vision Perimetry eye care and vision
Risks of refractive surgery Risks of refractive surgery
The ability of Visual Perception  The ability of Visual Perception     
The corneal incision procedures of Refractive surgery The corneal incision procedures of Refractive surgery
The functions of Optical nerve The functions of Optical nerve
The mobility of Eye defects The mobility of Eye defects
The process of extrocular muscles The process of extrocular muscles
Process of Refractive eye surgery Process of Refractive eye surgery
The role of aqueous humour The role of aqueous humour
The role of Fovea centralis The role of Fovea centralis
The treatment of Orthokeratology The treatment of Orthokeratology
Types of lenses used in Orthokeratology Types of lenses used in Orthokeratology
Unconscious inference of Visual Perception Unconscious inference of Visual Perception
Various aids Various aids
Various types of cataracts Various types of cataracts
Visual field and its effects Visual field and its effects
Visual field losses in eye health Visual field losses in eye health
What is Myopia? What is Myopia?
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How to Keep Diabetes under Control?
Diabetes is a very serious and silent disease. Most people along with those who have diabetes generally don't recognize the seriousness and symptoms of the diabetes. Some of the true facts about diabetes are even more astounding. According to World Health Organization the number of diabetics through out the world was 171 millions in the year 2000 and expected to reach till 336 millions by 2030.
 
 
 
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The Mobility of Eye Defects


Many people with serious visual impairments can travel independently assisted by tactile paving and/or using a white cane with a red tip - the international symbol of blindness. A long cane is used to extend the user's range of touch sensation, swung in a low sweeping motion across the intended path of travel to detect obstacles. However, some visually impaired persons do not carry these kinds of canes, opting instead for the shorter, lighter identification (ID) cane. Still others require a support cane. The choice depends on the individual's vision, motivation, and other factors.

Each of these is painted white for maximum visibility, and to denote visual impairment on the part of the user. In addition to making rules about who can and cannot use a cane, some governments mandate the right-of-way be given to users of white canes or guide dogs.

A small number of people employ guide dogs. Although the dogs can be trained to navigate various obstacles, they are not capable of interpreting street signs. The human half of the guide dog team does the directing, based upon skills acquired through previous mobility training. The handler might be likened to an aircraft's navigator, who must know how to get from one place to another, and the dog is the pilot, who gets them there safely.

Orientation and Mobility Specialist are professionals who are specifically trained to teach people with visual impairments how to travel safely, confidently, and independently in the home and the community.

Most blind and visually impaired people read print, either of a regular size or enlarged through the use of magnification devices. A variety of magnifying glasses, some of which are handheld, and some of which rest on desktops, can make reading easier for those with decreased visual acuity. The rest read Braille (or the infrequently used Moon type), or rely on talking books and readers or reading machines. They use computers with special hardware such as scanners and refreshable Braille displays as well as software written specifically for the blind, like optical character recognition applications and screen reading software.

Some people access these materials through agencies for the blind, such as the National Library Service for the Blind and Physically Handicapped in the United States, the National Library for the Blind or the RNIB in the United Kingdom.

Closed-circuit televisions, equipment that enlarges and contrasts textual items, are a more high-tech alternative to traditional magnification devices. So too are modern web browsers, which can increase the size of text on some web pages through browser controls or through user-controlled style sheets.