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Y. Sagara, K. Watanabe, T. Nakazawa, N. Fuse, K. Takahashi, H. Akiyama, M. Seimiya, T. Seki, M. Kurusu, M. Tamai; P–VEP (pattern reversal visual evoked potentials) to identify the improvements of visual functions by acupuncture stimuli . Invest. Ophthalmol. Vis. Sci. 2004;45(13):5475.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To identify the improvements of visual functions by acupuncture stimuli by P–VEP and to access the selective possibility as a treatment to glaucoma subjects Methods: Twenty one healthy volunteers (well– trained subjects),between the age 's23and 49(male 15,female 6)without eye diseases were given acupuncture stimuli ,tested for about one month at the department of Ophthalmology and the department of Geriatric and respiratory Medicine.They were administered acupuncture at 10needle points,IR3(R,L) ,SP6(R,L),GB20(R,L),GV20,EX–HN2 andBL2(R,L) for 15 minutes.We examined P–VEP to 2 rev/sec stimulation consisting of a black and white checker–board with central stimulus of 0 to 16 degrees radius ,and P–100amplitude and latency of the same cortical point before and after the acupuncture stimuli. The pupil diameters were checked and the results showed that there were no differences between them before acupuncture stimuli and after . Results:P–100 latency was advanced in 67%(14/21),was not changed in 14%(3/21) and delayed in 19%(4/21).Before treatment the cases were 104.7±2.11msec..After treatment the cases of more than 100msec.became shorter by 98.6±2.49msec.(P<0.0001).On the contrary the P–100 latencies in cases of less than 100msec. before treatment are not different than those after treatment(96.3±3.64msec.).The total average before is 102.1±4.99msec.and after 100±4.76msec.The difference is P<0.0001.But N75–to–P100 amplitudes showed that there were no differences in all cases.Good visual acuity without correcting subjects have not changed,but low subjects had advanced latency of P–100.In this group there are advanced visual acuity and unchanged subjects.The sujective symptoms after the treatments by advanced subjects were that they could see clearly and easily. Conclusions: These results suggest that this electric physiological method could be used to evaluate the effects of visual functions by the acupuncture stimuli .It is worthy of notice that low visual subjects gained advance visual functions. We have established that a P–VEP examination is a very useful method to identify the improvement of visual functions.We have started to use this acupuncture stimuli for glaucoma subjects twice a week for one month on a trial basis. P–VEP examinations are recorded as the method of checking the improvements of visual functions .
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