Abstract
Original language | English |
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Pages (from-to) | 1-8 |
Number of pages | 8 |
Journal | Ophthalmic and Physiological Optics |
Volume | 21 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2001 |
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The influences of stimulus wavelength and eccentricity on short-wavelength pathway isolation in automated perimetry. / Cubbidge, R. P.; Wild, J. M.
In: Ophthalmic and Physiological Optics, Vol. 21, No. 1, 01.2001, p. 1-8.Research output: Contribution to journal › Article
TY - JOUR
T1 - The influences of stimulus wavelength and eccentricity on short-wavelength pathway isolation in automated perimetry
AU - Cubbidge, R. P.
AU - Wild, J. M.
PY - 2001/1
Y1 - 2001/1
N2 - The aim of the study was to determine whether the suggested stimulus and background parameters employed in commercially available short-wavelength sensitive perimetry (SWAP) are clinically appropriate. Threshold versus intensity curves were measured using a modified Humphrey Field Analyser. The reduction in background luminance was achieved using aperture stops in order to avoid changes in the chromaticity of the background. Short-wavelength thresholds were determined for 440, 450 and 460 nm stimuli and were corrected for pre-receptoral absorption. Short-wavelength sensitive pathway isolation was approximately 1.5 log units and decreased with increases in eccentricity and in stimulus wavelength. It would seem that the use of a 450 nm narrowband stimulus filter would offer a compromise between both the physiological requirements and the physical properties of the stimulus. Such an approach would reduce some of the inherent between-subject normal variability associated with SWAP.
AB - The aim of the study was to determine whether the suggested stimulus and background parameters employed in commercially available short-wavelength sensitive perimetry (SWAP) are clinically appropriate. Threshold versus intensity curves were measured using a modified Humphrey Field Analyser. The reduction in background luminance was achieved using aperture stops in order to avoid changes in the chromaticity of the background. Short-wavelength thresholds were determined for 440, 450 and 460 nm stimuli and were corrected for pre-receptoral absorption. Short-wavelength sensitive pathway isolation was approximately 1.5 log units and decreased with increases in eccentricity and in stimulus wavelength. It would seem that the use of a 450 nm narrowband stimulus filter would offer a compromise between both the physiological requirements and the physical properties of the stimulus. Such an approach would reduce some of the inherent between-subject normal variability associated with SWAP.
UR - https://onlinelibrary.wiley.com/doi/abs/10.1046/j.1475-1313.2001.00538.x
U2 - 10.1046/j.1475-1313.2001.00538.x
DO - 10.1046/j.1475-1313.2001.00538.x
M3 - Article
VL - 21
SP - 1
EP - 8
JO - Ophthalmic and Physiological Optics
JF - Ophthalmic and Physiological Optics
SN - 0275-5408
IS - 1
ER -