Normal values of Positive wave in the Multifocal Electroretinography in Korean
Journal of the Korean Ophthalmological Society
; : 850-856, 2003.
Article
in Ko
| WPRIM
| ID: wpr-107565
Responsible library:
WPRO
ABSTRACT
PURPOSE: To obtain normal values of positive wave (b-wave) in the multifocal ERG in terms of age and sex of Koreans. METHODS: The multifocal ERGs by using RETIscan visual evoked response imaging system were tested for 80 eyes. 61 retinal locations were stimulated concurrently. We analyzed the average responses of 5 concentric rings. RESULTS: In the amplitudes of b-wave, ring 1, 84.1 5.4 nV/deg, was the largest of all the other rings and ring 5, 23.1+/-1.5 nV/deg, was the smallest of all the other rings (P<0.05). No statistically significant difference was observed in amplitude between sexs. The implicit time of b-wave was the longest in the ring 1, 40.8 1.6 ms, and shortest in the ring 4, 36.7+/-0.9 ms (P<0.05). CONCLUSIONS: The amplitude of b-wave was the largest in the fovea, and became smaller with eccentricity. The largest amplitude of b-wave was observed in the age of twenties. The amplitude of b-wave was decreased with age in the ring 3, 4, and 5. The interindividual variation of the amplitude of b-wave was greatest in the fovea. The implicit time of b-wave in the fovea was the longest, and that in the ring 4 was the shortest. It became longer from the ring 5, again.
Key words
Full text:
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Index:
WPRIM
Main subject:
Reference Values
/
Retinaldehyde
/
Electroretinography
/
Evoked Potentials, Visual
Language:
Ko
Journal:
Journal of the Korean Ophthalmological Society
Year:
2003
Type:
Article