visual fields 1 Flashcards
what is the extent of the visual field superiorly, inferiorly, temporally and nasally
superiorly - 60 degrees
inferiorly - 75 degrees
temporally - 100 degrees
nasally - 60 degrees
what is the binocular visual field extent
120 degrees
kinetic perimeter
goldman is an example
gross perimetry is also and example
target or stimulus moves and px reports when they see the light or not.
vary eccentricity from fixation
test meridians every 10 or 20 degrees
static perimeter
no examiner. computer based. stimulus does not move just flashes on and off in different locations
test fixed locations, typically 6 degrees apart
change stimulus intensity according to patient responses
isopter
a line joining points of equal retinal sensitivity to a given test stimulus
how to calculate sensitivity of static perimetry1
sensitivity is reciprocal of threshold
