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ABSTRACT: To study the influence of retinal adaptation on oscillatory potential (OP) using repeated-flash electroretinography.
Subjects were 28 adult eyes with normal retinas. Four stimuli (four flashes) of white light from a light-emitting diode built into a contact lens that also served as the recording electrode were presented at 5-s intervals after 30 min of dark adaptation (DA) and then after 10 min of light adaptation (LA). Recordings were made without background light.
Four OPs (O1, O2, O3, and O4) were recordable. After DA, amplitudes of O1 and O4 decreased with subsequent flashes, whereas those of O2 increased after the second flash. After LA, amplitudes of O3 and O4 were smaller than after DA.
Amplitude and implicit time of OPs were influenced by retinal adaptation. Among all OPs, O2 showed unique characteristics in course of retinal adaptation.
Japanese Journal of Ophthalmology 01/2010; 54(1):32-5. · 0.92 Impact Factor
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ABSTRACT: Efficacy and safety of blue-light-filtering acrylic IOL (HMY) were assessed and proven from 3 months to 1 year of postoperative follow-up in a clinical study performed on 80 eyes of 45 patients. Postoperative corrected visual acuity of all the eyes was 6/12 or better and 78.8% of them achieved higher than 6/6. The rate of mean corneal endothelial cell density decrease stood at 5.0%. Mild complications were observed, but none were serious.
Annals of Ophthalmology 02/2006; 38(4):311-6. · 0.16 Impact Factor
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ABSTRACT: To record electroretinograms (ERG) produced by short-wavelength-sensitive cone mechanisms (SWS-cone ERG), the authors used three kinds (blue, green, and red) of light-emitting diode (LED) which were built into a contact lens electrode assembly. The LEDs were used as both stimulus and background light sources. ERG was recorded using blue LED after 10 min of yellow light adaptation produced by green and red LEDs. Duration of photo-stimulation was either 2 or 100 ms. ERG recorded in normal human subjects showed two positive waves with 2 ms photo-stimulation. Amplitude of the former positive wave (b1-wave) was attenuated when the luminance of yellow background increased, and the latter positive wave (b2-wave) was attenuated when the color of photo-stimulation was green or red. These findings suggest that middle-wavelength-sensitive and long-wavelength-sensitive cone mechanisms generated the former positive wave (b1-wave) and SWS-cone mechanisms generated the latter positive wave (b2-wave). Ratio of b2-wave-amplitude to b1-wave-amplitude with 2 ms photo-stimulation measured on 39 normal subjects ranged from 0.5 to 2.0. It was concluded that this three-colored LED built-in electrode was useful for recording SWS-cone ERG.
Documenta Ophthalmologica 06/2003; 106(3):311-8. · 2.11 Impact Factor
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Japanese Journal of Ophthalmology 49(1):64-5. · 0.92 Impact Factor
