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Purpose: To study pattern reversal visual evoked potential (PVEPs) and determine the developmental character and mature time of visual function in normal infants at different months of age.Methods: PVEPs were recorded from 115 normal infants at 3,6,9,12 moths age. P1 latency for different checks (1°40’, 25’, 6’) was analyzed and compared to those of normal adults. Changes of N15 N2 latency of PVEPs were also exam-ioned.Results: P1 latency for all checks (1°40’, 25’, 6’) was significantly longer at 3 months than at 6 months of age (P<0. 05) > but no significant differences can be seen after 6 months of age for larger (1°40’) and intermediate (25’) checks (P> 0. 05). P1 latency for larger checks (1°40’) reached adult level after 3 months of age, but not for the intermediate check (25’), while P1 latency for small check (6’) presented the character of fluctuation.Conclusion : The visual system continued to develop after birth and appeared a certain regularity. Our results showed that P1 latency for lar
Purpose: To study pattern reversal visual evoked potential (PVEPs) and determine the developmental character and mature time of visual function in normal infants at different months of age. Methods: PVEPs were recorded from 115 normal infants at 3,6,9,12 moths P1 latency for all checks (1 ° 40 ’, 25’, 6 ’) was analyzed and compared to those of normal adults. Changes of N15 N2 latency of PVEPs were also examined-ioned. Results: P1 latency for all checks ( 1 ° 40 ’, 25’, 6 ’) was significantly longer at 3 months than at 6 months of age (P <0. 05)> but no significant differences can be seen after 6 months of age for larger (1 ° 40’ P1 latency for larger checks (1 ° 40 ’) reached adult level after 3 months of age, but not for the intermediate check (25’), while P1 latency for small check (6 ’) presented the character of fluctuation.Conclusion: The visual system continued to develop after birth and played a certain regularity. Our resultsrect that P1 latency for lar