• Anju Kumari Mahato
• Vikram Thakur
• Kamal Thakur
• Rahul Roy
• Sharath NS

Objectives: The purpose of our study was to evaluate the changes in latency and amplitude in terms of P100 with different check sizes and fixation sizes on PR-VEP in normal individuals. Methods: The total sample size of our project was 30 individuals. A complete history of the volunteering patient was recorded. Each subject underwent a complete ophthalmic examination as a preliminary measure to exclude any ocular pathology. Visual evoked potential and its parameters (N80 Latency, P100 Latency and P100 Amplitude) for different checkerboard sizes and fixation sizes were recorded using a pattern reversal checkerboard with subjects seated comfortably at a distance of 72cm. Results: There was a significant difference in latency and amplitude with a different checkerboard pattern. The latency was maximum for 4 x 4 squares and minimum for 13 x 13 squares. The amplitude difference was maximum for 13 x 13 squares and minimum for 4 x 4 squares. Conclusion: Check size significantly affects the latency and amplitude of the 100ms and/or P100, but not the receptive areas for the stimulation. There was no change in latency and amplitude with different fixation sizes.

Visual evoked potential, Pattern reversal, P100 latency, P100 amplitude, N80 latency

"Effect Of Different Check Sizes And Fixation Sizes On Pattern Reversal Visual Evoked Potential In Normal Individuals.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 9, page no.d573-d576, September-2022, Available :http://www.jetir.org/papers/JETIR2209369.pdf

"Effect Of Different Check Sizes And Fixation Sizes On Pattern Reversal Visual Evoked Potential In Normal Individuals.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 9, page no. ppd573-d576, September-2022, Available at : http://www.jetir.org/papers/JETIR2209369.pdf