Eye Conditions
A CCTV has given botanical illustrator Judy a clearer view of the natural world.
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Common Eye Conditions leading to Blindness and Low Vision
Low vision can be caused by a number of different diseases, conditions or accidents. Some eye conditions are congenital (present at or near birth), others are caused by a disease or infection and others can be caused by accidents or through exposure to damaging UV rays (sunlight) or chemicals.
The following are common causes of blindess and low vision.
What is Blindness?
An individual is considered legally blind when they cannot see at six metres what someone with normal vision can see at 60 metres. A person is legally blind if their field of vision is less than 20 degrees in diameter. A person with normal vision can see 180 degrees.
Government departments use the term 'legally blind' to define a person whose degree of sight loss entitles them to special benefits.
What is Vision Loss?
The term 'Vision Impairment' simply means an individual has some degree of sight loss.
Some forms of vision impairment can be corrected through the use of glasses or contact lenses. Other forms can be treated. However, unfortunately there are still many eye conditions that are untreatable.
People with vision impairment can lead normal, fulfilling and rewarding lives. Sometimes they just need a little assistance and support to ensure they maintain their independence and can perform daily tasks with confidence.
Most people with vision impairment will have some degree of sight and whilst they may use a white cane or guide dog to help them move around in their communities, Vision Australia can also assist them with maintaining their independence and maximise the use of their remaining vision.
Blindness and Low Vision in Australia
- Around 292 700 Australians are blind or vision impaired (2004). Figure set to increase to 421 600 by 2021 as 'baby boomers' reach retirement age. (Source: ABS: Ausstats, 2004.)
- Every 65 minutes an Australian is diagnosed with a vision impairment that cannot be corrected by glasses. (Source: ABS: Ausstats, 2004.)
- In Australia only 3 to 5% of print material is available in an accessible format. (Source: International Federation of Library Associations and Institutions.)
This page last updated: 26 March 2009