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Volume 3, Issue 3 (Summer 2017)
Caspian J Neurol Sci 2017, 3(3): 135-142 |
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Shokouhian M, Alizadeh Y, Khosravi B, Jafarzadehpour E, Souri H. Normal Values of Standard Full Field Electroretinography in Healthy Subjects in Northern Iran . Caspian J Neurol Sci 2017; 3 (3) :135-142
URL: http://cjns.gums.ac.ir/article-1-183-en.html
URL: http://cjns.gums.ac.ir/article-1-183-en.html
Mansoureh Shokouhian1 
, Yousef Alizadeh2 , Bahram Khosravi3 , Ebramim Jafarzadehpour * 4, Hamid Souri5
, Yousef Alizadeh2 , Bahram Khosravi3 , Ebramim Jafarzadehpour * 4, Hamid Souri5
1- Optometrist, Amiralmomenin Hospital, Rasht, Iran
2- Eye Research Center, Amiralmomenin Hospital, Guilan University of Medical Sciences, Rasht, Iran
3- Assistant Professor of Optometry, Optometry Department, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4- Professor of Optometry, Optometry Department, Iran University of Medical Sciences, Tehran, Iran; jafarzadehpour.e@iums.ac.ir
5- Professor of Epidemiology, Epidemiology Department, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2- Eye Research Center, Amiralmomenin Hospital, Guilan University of Medical Sciences, Rasht, Iran
3- Assistant Professor of Optometry, Optometry Department, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4- Professor of Optometry, Optometry Department, Iran University of Medical Sciences, Tehran, Iran; jafarzadehpour.e@iums.ac.ir
5- Professor of Epidemiology, Epidemiology Department, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Abstract: (3014 Views)
Background: Electroretinography (ERG) is known as a diagnostic test for evaluating the performance of different layers of the retina. Its normal values maybe different in different populations.
Objectives: Determining the normal values of ERG parameters in patients presenting to an ophthalmologic center in Guilan in northern Iran.
Materials and Methods: Fifty-five people presenting to a teaching hospital affiliated to Guilan University of Medical Sciences were studied in autumn and winter 2013.The subjects were diagnosed as healthy in the eye examinations and were examined in terms of the values of amplitude and latency time of ERG waves in accordance with international guidelines for clinical electrophysiology of vision.
Results: In this study, 55 patients with a mean age of 35±14 years were studied (40% males with a mean age of 36.00±15.4 years; 60% females, with a mean age of 34.5±14 years). The following results were obtained: amplitude of scotopic 0.01=149±144 µV, scotopic 3=317±157µV, photopic=129±86 µV, 30-Hz flicker=134±38 µV, OS2=25.6±13.9 µV, Latency time scotopic 0.01=53.5±29 sec, Latency Time Scotopic 3=34.3±15.2 sec, N1=13.59±2 sec, P1=18.63±1 sec, N2=21.3±1 sec, P2=26.1±2.7 ms, N3=31.1±4 sec, P3=33.8±4.7 sec, N4=40.9±6.4 sec, P4=44.3±6.4 sec, Latency Time photopic=22.9±7.7 ms, and flicker=54.3±7.5 ms. Men and women were not significantly different in terms of the variables. Left and right eyes, as well as age groups were not significantly different (p=0.05).
Conclusion: The results of the current study differed from other studies in terms of the values of amplitude and latency times. Therefore, it is necessary to standardize ERG for each center.
Objectives: Determining the normal values of ERG parameters in patients presenting to an ophthalmologic center in Guilan in northern Iran.
Materials and Methods: Fifty-five people presenting to a teaching hospital affiliated to Guilan University of Medical Sciences were studied in autumn and winter 2013.The subjects were diagnosed as healthy in the eye examinations and were examined in terms of the values of amplitude and latency time of ERG waves in accordance with international guidelines for clinical electrophysiology of vision.
Results: In this study, 55 patients with a mean age of 35±14 years were studied (40% males with a mean age of 36.00±15.4 years; 60% females, with a mean age of 34.5±14 years). The following results were obtained: amplitude of scotopic 0.01=149±144 µV, scotopic 3=317±157µV, photopic=129±86 µV, 30-Hz flicker=134±38 µV, OS2=25.6±13.9 µV, Latency time scotopic 0.01=53.5±29 sec, Latency Time Scotopic 3=34.3±15.2 sec, N1=13.59±2 sec, P1=18.63±1 sec, N2=21.3±1 sec, P2=26.1±2.7 ms, N3=31.1±4 sec, P3=33.8±4.7 sec, N4=40.9±6.4 sec, P4=44.3±6.4 sec, Latency Time photopic=22.9±7.7 ms, and flicker=54.3±7.5 ms. Men and women were not significantly different in terms of the variables. Left and right eyes, as well as age groups were not significantly different (p=0.05).
Conclusion: The results of the current study differed from other studies in terms of the values of amplitude and latency times. Therefore, it is necessary to standardize ERG for each center.
Keywords: Electroretinography, Reference Values
Type of Study: Research |
Subject:
Special
Received: 2017/08/13 | Accepted: 2017/08/13 | Published: 2017/08/13
Received: 2017/08/13 | Accepted: 2017/08/13 | Published: 2017/08/13
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Articles Copyright © The Author(s).
Owned by Guilan University of Medical Sciences.
Co-published by Negah Institute for Scientific Communication.
Contact Information
Caspian Journal of Neurological Sciences
Guilan University of Medical Sciences
University Tel : +9813 3333 0939
E-mail: cjnsgums@gmail.com, cjns@gums.ac.ir
Owned by Guilan University of Medical Sciences.
Co-published by Negah Institute for Scientific Communication.
Contact Information
Caspian Journal of Neurological Sciences
Guilan University of Medical Sciences
University Tel : +9813 3333 0939
E-mail: cjnsgums@gmail.com, cjns@gums.ac.ir
