Multifocal electroretinogram in normal emmetropic subjects: Correlation with optical coherence tomography.
Indian J Ophthalmol
;
2012 Jan; 60(1): 49-52
Article
in English
| IMSEAR
| ID: sea-138789
ABSTRACT
Aim of the Study To establish the normative database for multifocal electroretinogram (mfERG) parameters in a normal emmetropic population. To correlate the data so obtained with the central macular thickness obtained using the optical coherence tomography (OCT) scan. Materials and Methods:
mfERG data were obtained from 222 eyes of 111 emmetropic subjects. The amplitude (nv/deg2) and implicit times (ms) of the first-order kernel mfERG responses (N1, P1, and N2 waves) were obtained and grouped into five rings (Ring 1 Central 2°, Ring 2 2–5°, Ring 3 5–10°, Ring 4 10–15°, Ring 5 >15°). The central macular thickness (CMT) was obtained using the macular thickness scan protocol of the OCT.Results:
The mfERG data obtained were used to create a normative database. The amplitudes of the mfERG waves were maximum in the fovea and progressively decreased with increasing eccentricity (P = 0.0001). The latencies of the P1 and N2 waves were longest in the central ring and progressively shortened with eccentricity (P = 0.0001). No statistically significant correlations were observed between central ring 1 parameters and the CMT.Conclusion:
This study establishes normative database for mfERG parameters in an emmetropic population. No statistically significant correlation was noted between CMT and mfERG parameters.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Reference Values
/
Retina
/
Humans
/
Reproducibility of Results
/
Adult
/
Tomography, Optical Coherence
/
Electroretinography
/
Emmetropia
/
Middle Aged
Language:
English
Journal:
Indian J Ophthalmol
Year:
2012
Type:
Article
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