![](/images/graphics-bg.png)
Pattern visual evoked potential in response to monocular and binocular : stimulation in normal and amblyope subjects
Joint Authors
Ostadi-Moghaddam, H.
Yekta, A. A.
Mahjub, M.
Heravian, J.
Source
Iranian Red Crescent Medical Journal
Issue
Vol. 10, Issue 2 (30 Apr. 2008), pp.69-74, 6 p.
Publisher
Publication Date
2008-04-30
Country of Publication
United Arab Emirates
No. of Pages
6
Main Subjects
Topics
Abstract EN
Background : Amblyopia is a relatively common condition with an incidence of 2-2.5 % in which visual acuity through an eye is subnormal despite no overt pathology.
The use of pattern visual evoked potential (P-VEP) has been the primary technique for electro physiologically detecting amblyopia in patients unable to undergo conventional testing.
This study was performed to evaluate the effectiveness of P-VEP parameters in amblyopic patients under monocular and binocular conditions.
Methods : Visual function was measured using P-VEP and Snellen acuity test in 30 children with amblyopia (12strabismic and 18 anisotropic amblyopic) and 30 visually normal control subjects.
Results : Totally, visual evoked potentials elicited by high contrast small checkerboard patterned stimuli were significantly reduced in amplitude and prolonged in latency in amblyopic eyes.
The mean intraocular amplitude difference was significantly larger in amblyopic than in normal groups.
There was also no difference between the healthy eye in the amblyopic group and the control one.
On binocular viewing, the amount of VEP amplitude was significantly greater in normal subjects than that in both amblyopic groups.
Regarding the type of amblyopia, the mean binocular VEP amplitude as compared to that in the non-amblyopic eye was greater for the anisotropic than the strabismus groups Conclusion: In both amblyopic groups, the VEP responses were significantly reduced in amplitude and prolonged in latency.
In binocular viewing, the amount of VEP amplitude was greater in normal subjects than both amblyopic groups.
The mean binocular amplitude was significantly greater for the anisotropic than for the strabismus group.
American Psychological Association (APA)
Heravian, J.& Ostadi-Moghaddam, H.& Yekta, A. A.& Mahjub, M.. 2008. Pattern visual evoked potential in response to monocular and binocular : stimulation in normal and amblyope subjects. Iranian Red Crescent Medical Journal،Vol. 10, no. 2, pp.69-74.
https://search.emarefa.net/detail/BIM-28219
Modern Language Association (MLA)
Heravian, J.…[et al.]. Pattern visual evoked potential in response to monocular and binocular : stimulation in normal and amblyope subjects. Iranian Red Crescent Medical Journal Vol. 10, no. 2 (Apr. 2008), pp.69-74.
https://search.emarefa.net/detail/BIM-28219
American Medical Association (AMA)
Heravian, J.& Ostadi-Moghaddam, H.& Yekta, A. A.& Mahjub, M.. Pattern visual evoked potential in response to monocular and binocular : stimulation in normal and amblyope subjects. Iranian Red Crescent Medical Journal. 2008. Vol. 10, no. 2, pp.69-74.
https://search.emarefa.net/detail/BIM-28219
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 73-74
Record ID
BIM-28219