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KMID : 0378119950220020561
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Chungnam Medical Journal
1995 Volume.22 No. 2 p.561 ~ p.568
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Visual Evoked Potential in Amblyopia
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Abstract
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Amblyopia is poor vision without anatomic abnormality in the eye and can not be improved by lenses. It usually occurs in one eye as a consequence of visual deprivation during the critical period, but has relative good prognosis by early diagnosis
and
treatment. Conventional evaluation methods are difficult to apply in infants and preverbal aged children because of poor cooperation. The purpose of the present study is to assess the usefulness of visual evoked potentials in the diagnosis of
amblyopia.
Visual evoked potentials were measured by reversing checkerboard and/or LED goggles stimulation in thirty-nine amblyopic patients and twenty control subjects. The latencies are not different between normal and amblyopic group and also intereye
comparison. But amplitude is significant different between two groups by pattern reversal and LED goggle stimulation. But the sensitivity is higher by pattern reversal stimulation. And comparison of amplitude difference or amplitude ratio between
the
eye are more superior methods, especially pattern reversal stimulation. We think visual evoked potential study can be applied screening test of amblyopic children and identifying emblyopic eye.
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