Visual field refers to the entire area that a person can see without shifting their gaze. For a person to be described as “legally blind”, they will have a visual field of less than 20 degrees. Visual acuity refers to the clarity of keenness of vision which a person can see. Normal visual acuity is 6/6 or 20/20. For a person to be described as “legally blind” they will have 6/60 vision or less. In other words a person cannot see in either eye at 6 metres, with corrective devices, what a person with normal vision can see at 60 metres.
The SDS classification system combines physically disabled and visually impaired bowlers in one class in most instances but provides separate classes for bowlers who use a wheelchair, bowlers who have a learning disability or intellectual impairment and bowlers who are totally blind.
The SDS classes are as follows:
- Class 1 – totally blind bowlers. B1 class;
- Class 2 – bowlers who use a wheelchair and have good arms, hands and trunk;
- Class 3 – bowlers who use a wheelchair but have weakness in arms/trunk;
- Class 4/5 – bowlers who are ambulant and not restricted by their physical impairment during delivery, plus bowlers in B3 class of visual impairment. Men (4) and women (5);
- Class 6/7 – bowlers who are ambulant and restricted in their bowling arm, trunk or have balance difficulties plus bowlers in B2 class of visual impairment. Men (6) and women (7);
- Class 8/9 – ambulant bowlers with a learning disability. Men (8) and women (9).
Classification System for Blind and Visually Impaired Bowlers only
The Scottish Association of Blind Bowlers (SABB), established in 1963, has jurisdiction over the competition programme and classification process for all blind and visually impaired bowlers in Scotland.
The SABB has access to a network of ophthalmologists who will assess the sight of individual bowlers and thereafter appropriately classify.
The SABB competition programme is available to blind and visually impaired bowlers only.
The classification system used by the SABB mirrors that of the international parent body, the International Blind Bowls Association (IBBA).
The system recognises four classes of blind and visually impaired bowlers.
- Class B1 – no light perception in either eye up to light perception but no recognition of hand movements at any distance or in any direction;
- Class B2 – from the ability to recognise hand movements up to a visual acuity of 2/60;
- Class B3 – from a visual acuity of better than 2/60 up to a visual acuity of 6/60;
- Class B4 – a visual acuity of better than 6/60 up to a visual acuity of worse than 6/24 and /or a significantly reduced visual field of 20 degrees or less.
In all classes the bowler has the option of being guided by a sighted director.
The International Bowls for the Disabled (IBD)
At international level, the ruling governing body for disability bowls, for all impairment groups, is the International Bowls for the Disabled (IBD). The IBD has appointed a chief classifier to oversee and administer classification throughout the international community of bowls nations.
The IBD system of classification for physically impaired bowlers is implemented at the IBD World Championships and the Para Sports bowls competition at the Commonwealth Games.
Classification is carried out only at IBD sanctioned events by internationally approved IBD classifiers. Classification panels normally consist of a minimum of two classifiers with at least one classifier professionally qualified to conduct a physical assessment.
The process by which a new international bowler is assessed by a classification panel, in order that the bowler may be allocated a sport class and a sport status, is called athlete evaluation. The physical assessment will be conducted in accordance with the sports profiles for the sports classes, to confirm that the bowler has an eligible impairment. This will be followed by a technical assessment in a non-competitive environment. The final stage of the process will be observation assessment, requiring the classification panel to observe the bowler in competition.
The IBD identifies the main sensory and physical functions of bowls as follows:
- Vision – ability to see a jack and bowls on a full length end;
- Grip – ability to hold and release a bowl;
- Balance – in the stance and during delivery;
- Step and bend – forward movement and lowering of the body to deliver a bowl;
- Arm swing – back and forward movement of the arm during delivery;
- Upper body strength – ability to play a full length end.
The IBD has identified the following classes and sports profiles for high performance bowlers with a physical impairment.
- Class B6 – Ambulant and wheelchair bowlers with reduced balance function (loss of 5 points or more) but able to bowl a full length end;
- Class B7 – Ambulant and wheelchair bowlers with minor balance problems (loss of less than 5 points);
- Class B8 – Ambulant bowlers, who have a permanent and irreversible disability, have lost 10 points on the bench test, but have no noticeable impairment of function;
The classification system used by the IBD for blind and visually impaired bowlers mirrors that of the international parent body, the International Blind Bowls Association (IBBA). The system recognises four classes of blind and visually impaired bowlers.
- Class B1 – no light perception in either eye up to light perception but no recognition of hand movements at any distance or in any direction;
- Class B2 – from the ability to recognise hand movements up to a visual acuity of 2/60;
- Class B3 – from a visual acuity of better than 2/60 up to a visual acuity of 6/60;
- Class B4 – a visual acuity of better than 6/60 up to a visual acuity of worse than 6/24 and /or a significantly reduced visual field of 20 degrees or less.
- In all classes the bowler has the option of being guided by a sighted director.
More detailed information is available on the IBD web site:
www.interdisabledbowls.org
Download the Para Bowls Classification booklet here.
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