J Korean Ophthalmol Soc > Volume 56(12); 2015 > Article
Journal of the Korean Ophthalmological Society 2015;56(12):1874-1879.
DOI: https://doi.org/10.3341/jkos.2015.56.12.1874    Published online December 15, 2015.
Clinical Usefulness of Fresnel Ganzfeld Stimulator.
Jung Woo Han, Yoon Jin Kong, Tae Kwann Park, Young Hoon Ohn
Department of Ophthalmology, Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea. yhohn@schmc.ac.kr
프레넬 간츠펠드 자극기의 임상적 유용성
한정우⋅공윤진⋅박태관⋅온영훈
순천향대학교 의과대학 부천병원 안과학교실
Received: 15 May 2015   • Revised: 24 July 2015   • Accepted: 25 September 2015
Abstract
PURPOSE
To compare electroretinogram (ERG) waveforms acquired using a ganzfeld stimulator and a Fresnel ganzfeld stimulator. METHODS: ERGs were recorded with a ganzfeld stimulator and a Fresnel ganzfeld stimulator from both eyes of 25 volunteers. Peak-to-trough amplitudes and peak implicit times were compared between both eyes and between a ganzfeld stimulator and a Fresnel ganzfeld stimulator. ERGs taken from the sitting and supine positions were also compared using the Fresnel ganzfeld stimulator. RESULTS: There was no statistically significant difference between the Fresnel ganzfeld stimulator and dome-shaped ganzfeld stimulator in amplitude and implicit time of dark adapted 0.01, 3.0 ERG, photopic 3.0 ERG, photopic 3.0 flicker. The differences in amplitude and implicit time between the right and left eyes were not influenced by the Fresnel ganzfeld stimulator. Additionally, no differences were observed in ERGs obtained from the sitting and supine positions using the Fresnel ganzfeld stimulator. CONCLUSIONS: The newly developed ganzfeld stimulator with a sealed Fresnel lens can be considered as a reliable alternative method for measuring ERGs. Fresnel ganzfeld stimulator is useful for patients having problems with mobility or uncooperative children.
Key Words: Electroretinogram (ERG);Fresnel lens;Ganzfeld stimulator


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