Apparatus and method for assessing and improving the reliability of a visual field test
AssigneeIbisVision Limited
InventorBlair Donaldson
Life of this patent
Estimating the term…
Abstract
Apparatus for testing a patient's visual field, the apparatus comprising: means for recording the results of the patient's responses to one or more visual field targets (5) presented during a visual field test; and a fixation loss switch activatable by an observer observing the patient during the visual field test for identifying periods of fixation loss by the patient. The results recorded during periods of fixation loss are identified as being unreliable. Also disclosed is a method of testing a patient's visual field.
Claims24
Visual field testing apparatus for testing a patient's visual field, the apparatus comprising:
- recording means for recording the results of the patient's responses to one or more visual field targets presented during a visual field test;
- and
- a fixation loss switch activatable by an observer observing the patient during the visual field test for identifying periods of fixation loss by the patient;
- wherein results recorded during periods of fixation loss are identified as being unreliable.
A method of testing a patient's visual field, the method comprising:
- recording the results of patient responses to one or more visual field targets presented during the visual field test;
- providing a fixation loss switch activatable by an observer observing the patient during the visual field test where activation of the switch identifies a period of fixation loss by the patient;
- and
- identifying results recorded during periods of fixation loss as being unreliable.
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Dependencies are inferred from the claim text.