Study of blue and red flash in dark-adapted electroretinogram
- Abstract
- PURPOSE: To investigate the characteristics of the waveform generated by blue and red light stimulations in a dark-adapted electroretinogram (ERG) and those of cone responses in the dark-adapted condition. METHODS: The study subjects were 52 persons (88 eyes) with no previous medical history. The author recorded b-waves (rod response) with red light stimulation and the x-waves (dark-adapted cone response) that appeared before the b-waves. The author also recorded b-waves with blue light stimulation, which had the same amplitude as the b-waves from the red light stimulation. The differences with respect to age and gender were studied. Waveforms of the dark-adapted cone ERGs were recorded by using a digital subtraction technique. RESULTS: The x-wave always appeared before the b-wave with 0 dB (2.4 cd.s/m2) red stimulation. With blue stimulation, a b-wave equivalent to the b-wave stimulated with the red light of 0 dB intensity appeared at an average of -14.57 dB. The implicit time for the b-wave was delayed significantly for the male group. There were no significant differences between different age groups. The dark-adapted cone ERG demonstrated the waveform of a negative response followed by a series of oscillatory potentials (OPs) and a positive response. CONCLUSIONS: The cone responses were followed by the rod responses with red light stimulation of 0 dB in the dark-adapted ERG. The waveforms of the cone ERGs were obtained in dark adaptation with red and blue light stimulation.
- All Author(s)
- S. H. Lim
; Y. H. Ohn
- Issued Date
- 2005
- Type
- Article
- Keyword
- Blue light; Dark-adapted electroretinogram; Red light; X-wave
- Publisher
- 대한안과학회
the Korean Ophthalmological Society
- ISSN
- 1011-8942
; 2092-9382
- Citation Title
- Korean Journal of Ophthalmology
- Citation Volume
- 19
- Citation Number
- 2
- Citation Start Page
- 106
- Citation End Page
- 111
- Language(ISO)
- eng
- DOI
- 10.3341/kjo.2005.19.2.106
- URI
- http://schca-ir.schmc.ac.kr/handle/2022.oak/2931
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