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  • Electroretinographic evaluation of the retinal S-cone system
    Šuštar Habjan, Maja, 1979- ; Hawlina, Marko ; Brecelj, Jelka
    The aim of this study was to differentiate S-cone responses from other retinalactivities using various recording conditions and to optimize these recording conditions for clinical diagnostics. S-cone ... responses to blue stimuli (449 nm) were studied in 20 healthy subjects and four patients with enhanced S-cone syndrome. The time-integrated luminance of the stimulus variedfrom 0.008 to 1.0 cd s/m(2). Three isoluminant backgrounds were used (100 ph cd/m(2) = 40 sc cd/m(2)): amber (594 nm), green (513 nm), and red (635nm). With low flash strengths (from 0.008 to 0.032 cd s/m(2)), the S-cone response appeared as a single positive peak, while with higher strengths (>/=0.064 cd s/m(2)), it appeared as a second peak that followed the L-cone and M-cone components. With a further increase in flash strength (>/=0.25 cd s/m(2)), the S-cone response interfered with the i-wave of the L-cone and M-cone systems. The wavelength and luminance of the background influenced the suppression of the rods, as well as the L-cone- and M-cone-system activities. The S-cone response was measurable in the presence of the amber and green backgrounds, but its amplitude was higher if a strong red background was used. Thus, the function of the retinal S-cone system can be measured if possible interference from other retinal sources can be minimized by the appropriate combination of stimulus and background parameters.
    Vir: Documenta ophthalmologica. - ISSN 0012-4486 (Vol. 123, issue 3, 2011, str. 199-210)
    Vrsta gradiva - članek, sestavni del
    Leto - 2011
    Jezik - angleški
    COBISS.SI-ID - 29237721
    DOI

vir: Documenta ophthalmologica. - ISSN 0012-4486 (Vol. 123, issue 3, 2011, str. 199-210)
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