Comparisons of Amplitude Reduction of Pattern Visual Evoked Potential (VEP) and Flash VEP between Using Srinagarind Eye Patch and Commercial Eye Patch in Normal Subjects
Phanthipha Wongwai MD*, Kanokpun Bumrungrachhirun MD*, Sirinya Suwannaraj MD*, Somkiat Asawaphureekorn MD, MSc*, Suphad Kaewphanna**
Affiliation : * Department of Ophthalmology, Srinagarind Hospital, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand ** Ophthalmic technician, Department of Ophthalmology, Srinagarind Hospital, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
Objective : To compare the difference of amplitude reduction of pattern VEP and flash VEP between occluding eye with
Srinagarind eye patches and commercial eye patches in normal subjects.
Material and Method: Fifteen subjects (7 males and 8 females) who had normal eye examinations were enrolled. Amplitude
of pattern VEP was recorded for each individual subject as baseline data. Right eyes were occluded with Srinagarind eye
patches and fellow eyes with commercial eye patches (3M) and then the VEP were retested (pattern and flash VEP). The
reduction of amplitude in pattern and flash VEP was recorded.
Results : The commercial eye patch significantly reduced the amplitude of retinal stimulation by pattern reversal stimuli on
pattern VEP better than the Srinagarind eye patch 1.68 μV (95% CI 0.48-2.87). The commercial eye patch group had
amplitude of retinal stimulation by light stimulation on flash VEP greater than the Srinagarind eye patch 3.92 μV (95% CI
-9.25-1.41), but not statistically significant. There was also no report of any serious side effects in either group.
Conclusion : This is the first study aiming to demonstrate the ability of the Srinagarind eye patch to reduce the retinal
stimulation compared with the commercial eye patch by using the VEP test. Further study is needed to test the effectiveness of
the Srinagarind eye patch.
Keywords : Eye patch, Occlusion, Srinagarind eye patch, Commercial eye patch, 3M eye patch, Amplitude of VEP reduction
