Study of Visual Evoked Potentials in Patients Suffering from Exotropia
Journal of Ophthalmic and Optometric Sciences,
Vol. 5 No. 2 (2021),
14 Azar 2022
https://doi.org/10.22037/joos.v5i2.39488
Abstract
Background: The present study aims to investigate the visual evoked potentials in patients with exotropia, a type of ocular deviation in which one or both eyes are deflected outwards.
Material and Methods: Twenty-five patients with exotropia aged 6-8 years participated in this study as a case group, and twenty-five age- and sex-matched controls were selected as control. VEP was recorded using the Pattern Reversal checkerboard technique for all participants. Latency (msec) and amplitude (μV) of VEP, P100 peak were measured in both groups.
Results: The mean amplitude of VEP, P100 peak was 2.92 and 7.84 μV in case and control groups, respectively, showing a statistically significant difference (P = 0.001). The difference in mean latency of the VEP, P100 peak was not statistically significant between the two groups (P = 0.45).
Conclusion: Exotropia is a visual disturbance that affects visual evoked potential P100 peak amplitude, whereas the latency of P100 remains intact.
- Exotropia
- Visual Evoked Potential
How to Cite
References
Shushtarian SMM, Mohammad-Rabei H, Raki STB. Effect of Occupational Vibration on Human Retina Measured by Electroretinography. Journal of Ophthalmic and Optometric Sciences. 2018;2(3):14-7.
Sarzaeim F, Ojani F, Hojati TS, Shojaei A, Shushtarian SMM. Effect of Hand-Arm Vibration on Retina of Road Drilling Machine Laborers Measured by Electroretinography. Journal of Ophthalmology and Research. 2022;5(2):81-5.
Tajik F, Shushtarian SMM. Electrooculographic and Electroretinographic Changes among Patients Undergoing Treatment with Amiodarone. Journal of Ophthalmic and Optometric Sciences. 2018;2(4):7-11.
Allahdady F, Aghazadeh Amiri M, Shushtarian M, Tabatabaee S, Sahraei F, Shojaei Baghini A, et al. Comparison of visual evoked potential and electro-oculogram tests in early detection of hydroxychloroquine retinal toxicity. Journal of Ophthalmic and Optometric Sciences Volume. 2016;1(1).
Shushtarian S, Kalantari AS, Tajik F, Adhami-Moghadam F. Effect of occupational vibration on visual pathway measured by visual evoked potentials. Journal of Ophthalmic and Optometric Sciences. 2017;1(5):7-11.
Keramti S, Ojani F, Shushtarian SMM, Shojaei A, Mohammad-Rabei H. Early Diagnosis of Pathological Changes in Visual System of Prolactinoma Patients Using Visual Evoked Potential. Journal of Ophthalmology and Research. 2021;4(3):289-93.
Ojani F, Shushtarian SMM, Shojaei A, Naghib J. Visual Evoked Potential Findings of Bardet-Biedl Syndrome. Journal of Ophthalmology and Research. 2021;4(3):254-7.
Sarzaeim F, Hashemzehi M, Shushtarian SMM, Shojaei A, Naghib J. Flash Visual Evoked Potential as a Suitable Technique to Evaluate the Extent of Injury to Visual Pathway Following Head Trauma. Journal of Ophthalmology and Research. 2022;5:20-3.
Sarzaeim F, Hashemzehi M, Shushtarian SMM, Shojaei A. Visual Evoked Potential Findings in Road Drilling Machine laborers. Journal of Ophthalmology and Research. 2022;5:43-7.
Shushtarian SMM, Naser M, Adhami-Moghadam F, Shojaei A. Severe Headache Initiated by Flash Stimulation during Visual Evoked Potential Recording in a Patient with Monocular Optic Neuritis and History of Migraine Headache. Journal of Ophthalmic and Optometric Sciences. 2017;1(4):36-9.
Sarzaeim F, Abdolalizadeh S, Shushtarian SMM, Shojaei A. Visual Evoked Potential Findings in Patients using Anti-Seizure Medicine. Journal of Ophthalmology and Research. 2022;5(3):123-6.
Bähr KHaM. Optic nerve: Optic neuritis. Curated Ref Collect Neurosci Biobehav Psychol. 2015:205-9.
Shushtarian S, Norouzi A, editors. Effect of prism induced heterophoria on binocular visual evoked potential. 4th European Conference of the International Federation for Medical and Biological Engineering; 2009: Springer.
Leguire L, Rogers G, Bremer D. Visual-evoked response binocular summation in normal and strabismic infants. Defining the critical period. Investigative ophthalmology & visual science. 1991;32(1):126-33.
Heravian‐Shandiz J, Douthwaite W, Jenkins T. Effect of induced fixation disparity by negative lenses on the visually evoked potential wave. Ophthalmic and Physiological Optics. 1993;13(3):295-8.
Giuseppe N, Andrea F. Binocular interaction in visual-evoked responses: summation, facilitation and inhibition in a clinical study of binocular vision. Ophthalmic research. 1983;15(5):261-4.
Creel DJ. Visually evoked potentials. Handbook of clinical neurology. 2019;160:501-22.
- Abstract Viewed: 127 times
- pdf Downloaded: 149 times
