Using vision in the real world (Powerpoint, 1.1 MB)

Using vision
in the1 real
Mary Bairstow VISION 2020 (UK) Ltd
“Sometimes I've believed as many as
six impossible things before breakfast."
Lets try three
• Understanding how to maximise vision
• Getting the best out of optical devices
• Techniques that can help
“That's the reason they're called lessons,
because they lessen from day to day”
Nystagmus – null points and variability
Contrast – optimising use of light
Focus – which spectacles and when
• Age 7
• Cerebral palsy and nystagmus
• The lesson – Null point , reduced
accommodation, possible field defect
• How Alice learns to lessen……….
I wish I could shut up like a telescope! I
think I could, if I only knew how to begin
• Access to the right equipment
• Basic concepts – focus and
• Use and flexibility
• Examples
• Pocket lupe – labels and shops
• Hyperocular (high powered
lenses with short focus) – reading
• Telescope – science – observation at
arms length
Images from Eschenbach and Visionenhancers
• Age 14
• Congenital Cataracts
• Using stand device, small pocket lupe
and binoculars
• The lesson –No accommodation,
function v form
• How Lewis learns to lessen………
Images from Associated Optical and Visionenhancers
‘‘You may look in front of you, and on
both sides, if you like,' said the Sheep’’
Basic use and repetitive skills
Eccentric viewing
Haemianopia training
Use of minification in localisation
Use of ‘ghost images 'with prisms
Telescope training – scanning / searching
• Age 15
• Stargardt’s maculopathy
• Using I pad and mobile phone (oops) +
specs, pocket lupe and telescope
• The lesson – eccentric viewing, telescope
• How Carol learns to lessen …….
Images from Eschenbach
“Begin at the beginning and go on till
you come to the end: then stop”
Help a young person use their vision in the real
world by lessening the lesson
• Understanding of how their vision works
• Appreciating use of optical devices
• Being adept in their use