IERG Abstracrt Book.indd - LV Prasad Eye Institute

114 Clinical Poster Sessionsvs superior and average color discrimination. Reliability was assessed by retesting subjects at alater sitting. There was no significant change in TES on retesting (p = 0.65)Conclusions: Computer based FM 100-Hue test is an effective, reliable and rapid methodfor classifying color defect and grading color discrimination in color defective and normalsubjects.ICP 042Normative Database for ColorDome Epsion Electroretinogram in IndianPopulationVerkicharla Pavan Kumar, Hari krishna, Padmaja Kumari RaniL V Prasad Eye Institute, Hyderabad, IndiaPurpose: To evaluate the retinal function in normal subjects with different age and genderusing Epsion Colordome ERG to obtain a database of Normative values of ERG conforming toISCEV standards in Indian population therefore creating a baseline data for abnormal values.Methods: 46 normal eyes (only right eye )from normal Indian subjects aged 18 to 35 (mean= 26.5) were studied. Full field flash ERG’S were recorded according to ISCEV standard usingBurian-Allen electrode. All the subjects were presented with stimulus emitted from the LEDstimulator system which included (38steps) 23 different intensities for scotopic responsesand 15 different intensities to get photopic responses thus making the result more accuratecompared to conventional ERG.Results: The mean of the responses were calculated for all the 23 scotopic and the 15photopic responses. Scotopic responses: Mean for the ‘a’ and ‘b’ wave amplitude and implicittime are 5.29+/- 2.86mv and 139.75+/-54.99 ms for 7th step. The 15th step ‘b’ wave showedamp of 387.49 +/- 69.87mv with the implicit time of 50.81+/- 5.76ms..For the last step it is254.83+/-106.55mv and 37.27+/- 15.32ms. Photopic responses: Amplitudes and implicit timeof b wave are 111.65+/-36.29 and 43.83+/- 3.39 respectively for the 1st step i.e Mixed Rod/Cone Response. 116.76+/-29.71 and 34.49 +/- 2.84 for the 8th step (cone mediated flash),116.76+/-29.71mv and 38.06+/-2.86ms were found for 12thstep (Response to White Flash).The mean and standard deviation values of amplitudes of 4 oscillatory potentials are: 13.48+/-2.75 mv, 26.66 +/-5.75 mv, 12.08+/- 4.14 mv, 7.90+/-2.61 mv and Implicit times are 18.23+/-1.05ms, 24.30+/- 1.11 ms, 32.92+/-1.89 ms, 40.05+/-2.78ms respectively. Light and dark adaptedflicker amplitudes are 32.92+/-2.62mv, 34.32+/- 9.71mv with implicit times of 25.70+/- 1.63msand 27.58+/- 1.84ms were recorded.Conclusions: The study provides the normal ERG parameter values for the Indian population.These values obtained will be incorporated into the epsion clinical protocols to automaticallyflag those ERG parameters that exceed normal limits during the test. with these results usingEpsion Colordome ERG- detection, diagnosis, quantifying the retinal damage ,also to compareand determine the progression of retinal disorders can be made more accurately.