Combined Spatial, Contrast, and Temporal Functions Perimetry in Mild Glaucoma and Ocular Hypertension

Abstract

The novel Pulsar T30W perimetry may be helpful for the study of mild glaucoma and ocular hypertension.

Non-conventional perimetric methods in the detection of early glaucomatous functional damage

“…17 With regard to the diagnostic performance, PP showed a good ability in early-stage glaucoma detection, in which MD was the best diagnostic parameter, similarly to other studies. 19 The best performing parameters of the three perimetric tests showed comparable AROCs (Tables 3 and 4). Our study design involved a randomised testing order, thus it is unlikely that fatigue or learning effect might have introduced bias.…”

“…30 PP uses targets that reach highspatial frequencies, which theoretically could stimulate the parvocellular system, while the high temporal frequency component could act on the magnocellular system. 19 Rarebit perimetry does not assess VF threshold Se at tested points, but aims at evaluating the integrity of the visual system by assessing the proportion of observed stimuli compared with the total number of microdot presentations. The basic assumption behind RPB is that although the total number of RGCs may differ in the general population, the neuro-retinal architecture in most normal eyes should be complete, thus permitting the detection of paired dots of appropriate size, contrast, and separation in the VF.…”

“…PP has already been described elsewhere. 9,19,23 In brief, the PP stimulus consists of a circular sinusoidal 51 diameter grating pattern that is presented for 500 ms. The circular wave pattern is formed by light and dark alternating concentric bands that gradually decrease in contrast near the peripheral edges, until blending with the background of similar luminance (100 asb; 31.7 cd/m 2 ).…”

“…9 The T30W test examines the central 301 VF utilising a circular sinusoidal grating pattern that undergoes a counter phase pulse motion at 30 Hz, in which both spatial resolution (SR) and contrast are simultaneously modified. 19 The aim of our study was to compare the ability of FDT, RBP, and PP in discriminating between healthy and early glaucomatous eyes.…”

“…Its use in glaucoma diagnosis is relatively recent. 19 The PP T30W test was designed for glaucoma testing, in which temporal and spatial CSF are simultaneously tested. 9 The T30W test examines the central 301 VF utilising a circular sinusoidal grating pattern that undergoes a counter phase pulse motion at 30 Hz, in which both spatial resolution (SR) and contrast are simultaneously modified.…”