The Bott confrontation field target was designed by New Zealand Optometrist Alan Bott, who recognised the need for a small reliable, low-cost target to assess the visual fields of patients.
It has been well documented that a flashing light of known intensity and size is a suitable target for visual field testing. The purpose of this device is to provide a suitable target when assessing fields by confrontation.
The quality aluminium handle fits comfortably into the hand. Two AA-size batteries power the Wand. The handle supports a long black wand which contains the flashing LED light. The light is fitted into the side of the wand which allows it to be easily turned away from the subject to allow for false-positive tests.
Should the examiner feel that the subject either does not understand or is commenting when they see something other than the light, then the wand can be rotated through 180° which will prevent the light from being seen by the subject. If the examiner still gets a response, they will know it is a false positive and will need to re-instruct and re-test the subject.
Approved by NZ Land Transport Authority for assessing peripheral fields by confrontation.