Blur-Resistant Perimetric Stimuli
نویسندگان
چکیده
منابع مشابه
Spatiotemporal Summation of Perimetric Stimuli in Early Glaucoma.
PURPOSE To investigate achromatic temporal summation under the conditions of standard automated perimetry (SAP), using a Goldmann III (GIII) stimulus and a stimulus scaled to the local area of complete spatial summation (Ricco's area) in open-angle glaucoma (OAG) patients and healthy age-similar control participants. METHODS Twenty patients with OAG (mean age, 63 years; mean MD, -3.3 dB) and ...
متن کاملResponses of primate retinal ganglion cells to perimetric stimuli.
PURPOSE Perimetry is used clinically to assess glaucomatous ganglion cell loss. It has been proposed that frequency-doubling stimuli are better than the conventional size III perimetric stimulus in preferentially stimulating magnocellular (M) versus parvocellular (P) ganglion cells. However, little is known about how primate ganglion cells respond to perimetric stimuli. The authors recorded con...
متن کاملLuminance cues constrain chromatic blur discrimination in natural scene stimuli.
Introducing blur into the color components of a natural scene has very little effect on its percept, whereas blur introduced into the luminance component is very noticeable. Here we quantify the dominance of luminance information in blur detection and examine a number of potential causes. We show that the interaction between chromatic and luminance information is not explained by reduced acuity...
متن کاملEstimating the critical duration for temporal summation of standard achromatic perimetric stimuli.
PURPOSE To estimate the critical duration of temporal summation for achromatic Goldmann III stimuli under the conditions of standard automated perimetry (SAP) and quantify response variability for short-duration stimuli. METHODS Contrast thresholds were gathered using the method of constant stimuli for seven circular (0.48° diameter) incremental stimuli of varying duration (sum-of-frames equi...
متن کاملAssessing spatial and temporal properties of perimetric stimuli for resistance to clinical variations in retinal illumination.
PURPOSE To develop perimetric stimuli for which sensitivities are more resistant to reduced retinal illumination than current clinical perimeters. METHODS Fifty-four people free of eye disease were dilated and tested monocularly. For each test, retinal illumination was attenuated with neutral density (ND) filters, and a standard adaptation model was fit to derive mean and SEM for the adaptati...
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ژورنال
عنوان ژورنال: Optometry and Vision Science
سال: 2013
ISSN: 1040-5488
DOI: 10.1097/opx.0b013e31828fc91d