Why is assessing visual function important ?
.Allows us to find out the Px residual vision so that we can maximise its use.
What is the starting point of measuring visual function?
.Focimeter the specs all the time regardless of whether it’s a first second or third etc appointment.
Find out what they use the specs for.
What is the supplied magnification dependant on?
.Font
.Type of task
.Duration of task
How can you typically work out supplied magnification?
2:1 or 3:1 from your starting Mag
Why should you be wary of high jumps in magnification.
.Px may not be able to cope with the reduced FOV and working Distance (posture issues)
What is essential when refracting an LV Px?
Time and patience. Allow them to take their time and redo things.
What are some further tests that may assist in the management of the Px?
.VF
.Amsler chart
.Contrast sensitivity
What is the definition of visual impairment and what does it relate to?
.the functional consequence resulting from disease.
.relates to - loss of VA, loss of VF, colour vision loss,glare sensitivity.
What is the definition of contrast sensitivity?
The ability to determine the difference between light and dark.
How does measuring contrast sensitivity benefit a low vision Px?
.Provides info on how a Px will perform in a real life environment
.Determine the likely success of low vision aids
.Helps us to consider way to improve contrast for the Px.
What is a way to measure contrast sensitivity?
The Pelli-Robson chart
