Role of Blue on Yellow perimetry in the early detection of glaucomatous damage.

Abstract

Abstract : Blue on yellow perimetry is a modification of
standard automated perimetry using the same perimeter and
programs. It utilizes a 440 nm Goldmann type V stimulus at
200 milliseconds duration on a 100 candelasm2 yellow
background to test selectively the short wavelength sensitive
cones and their connection. The test is most likely processed
by the small bistratified blue on yellow ganglion cells, which
encompass approximately 5 of total population of retinal
ganglion cells. Blue on yellow perimetry or Short Wavelength
automated perimetry can detect early visual field loss before a
reduction in differential light sensitivity is shown with standard
White on White perimetry. The principle of Blue on Yellow
perimetry is to measure the sensitivity of the blue sensitive
cones in contrast with a yellow background. Blue on Yellow
perimetry tends to test a subset of retinal ganglion cells that
are lost in glaucoma.