Introducing children to Low Vision Aids
Thursday 19 April
A Basic Training Course for Children in the use of an LVA
(Adapted from Low Vision Aids Effective Management of Children with a Visual Impairment. Heather L. Mason School of Education University of Birmingham.)
Develop Maintenance Skills.
- Hold the LVA properly.
- Communicate the purpose of the LVA.
- Clean the LVA correctly.
- Assume the responsibility for the LVA.
- Store the LVA in a safe convenient location for easy use.
- Start to use the LVA independently.
Develop Magnifier Skills.
- Stabilise the reading material or object.
- Recognise the focal length of the magnifier and maintain it.
- Rest a stand magnifier on a page or flat surface.
- Adjust the head to magnifier distance for comfort to obtain the maximum field of view.
- Coordinate the appropriate hand, head and eye movements to the level of magnification used.
- Track at a speed consistent with an appropriate reading level.
- Develop stamina for the duration of an age graded task.
- Select the appropriate LVA for a task.
- Incorporate the use of the LVA for reading different print formats.
Develop hand held monocular skills.
- Position the VIP for optimal viewing.
- Scan the environment and locate a stationary object without the monocular.
- Locate the stationary object with the monocular.
- Focus on the stationary object.
- Identify an object with the LVA.
- Scan on a horizontal plane or use landmarks to find a stationary object with the monocular.
- Adjust the focus for objects at various distances.
- Copy familiar symbols.
- Scan with the LVA to locate signs, symbols of objects in a variety of planes.
- Track movement at a consistent focal distance.
- Develop a consistent systematic scanning technique to locate moving objects and incorporate landmarks if possible.
- Incorporate focusing and tracking on an object moving through a variety of different planes.
- Use of X-Y movable table.
- Focusing of the camera lens.
- Table height adjustment
- Increasing and decreasing the magnification level
- Use of on-screen typloscope.
- Use of image reversal
- Use of contrast and brightness controls.
It is important to note that pupils who have a higher reading speed require the CCTV to be set up with a maximal field size with minimum magnification consistent with good acuity, while slower readers giving maximal magnifications is useful despite the corresponding reduction in field.