Table 1 of Khan, Mol Vis 2010; 16:2753-2759.

Table 1. Electroretinography (ERG) response comparison between affected and normal individual of family RP50.

ERG measurements Adaptation Flash strength IV:6 IV:8 Normal values*
Scotopic 25 dB b-wave amplitude (µV) Dark 0.01 (cds/m2) 12.6 175.5 >141
Scotopic 0 dB b-wave amplitude (µV) Dark 3.0 (cds/m2) 38.6 469.4 >387
Oscillatory potential amplitude (µV) Dark 3.0 (cds/m2) 133.1 284.9 >75
Photopic 0 dB b-wave amplitude (µV) Light 3.0 (cds/m2) 32.4 156.7 >82
Photopic 30 Hz flicker amplitude (µV) Light 3.0 (cds/m2) 28.5 92.1 >56

Electrical responses of eyes to different intensities of light are compared to discriminate between the rod and cone response. The scotopic ERG, which represents the rod response, is more diminished in patient IV:6 compared to the photopic ERG, indicating a typical rod-cone dystrophy in family RP50.*Normal values at 30–40 years of age. Age at the time of investigation of individual IV:6 (affected) and IV:8 (normal) were 38 and 32, respectively.

Khan, Mol Vis 2010; 16:2753-2759. http://www.molvis.org/molvis/v16/a295

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