Perimetry techniques in neuro-ophthalmology.

Advances in technology have produced several new techniques for evaluating the visual field. The standard Humphrey perimeter now has programs for SWAP (Short-wavelength automated perimetry) and SITA (Swedish interactive thresholding algorithm). SITA seems particularly promising as an automated test that decreases testing time without sacrificing sensitivity or increasing variability. In addition, separate tests have been developed that may selectively evaluate particular pathways of the afferent visual system. This paper summarizes major advances in perimetry published in 1998 and 1999.