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Medical Forum / General / Vision / December 2006Prevention - pseudomyopia/accommodative spasm
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1 5885788&dopt=Abstract Safe ... effective ... proven. No risk of double vision. You can buy/make a corn/rice bag and microwave it.... The effect of periocular warming on accommodation. * Takahashi Y, * Igaki M, * Suzuki A, * Takahashi G, * Dogru M, * Tsubota K. Department of Ophthalmology, Jikei University School of Medicine, Tokyo, Japan. genichirot@aol.com PURPOSE: To investigate the effect of periocular warming on accommodation amplitude and near vision after prolonged near work in visual display terminal (VDT) workers in an office setting. DESIGN: Prospective interventional observational case series. PARTICIPANTS: Ten healthy Japanese male volunteers (mean age, 39.3+/-2 years [range, 36-43]) with a best distance corrected visual acuity (VA) of >20/20 who performed near work for 7 hours were included in the study. MAIN OUTCOME MEASURES: The differences of subjective and objective accommodations, near acuity, and pupil diameters were compared and studied in 2 experimental settings with and without periocular warming. METHODS: Two experiments were performed on each subject on 2 different days. In one experiment, the subjects wore an eye mask and closed their eyelids for 10 minutes after 7 hours of VDT work (lid closure [LC] group). In the other experiment, the subjects applied warming sheets (WSs) to their eyelids and the periocular region and wore masks for 10 minutes again after 7 hours of VDT work (WS group). Visual display terminal work was performed under the same settings on both days. Subjective and objective accommodations, near vision, and pupil diameters were measured immediately before and immediately after the resting or warming procedure and again 90 minutes after the resting or warming procedures. RESULTS: Fifty percent of eyes had an increase in the accommodation amplitude of at least 0.5 diopters immediately after application of the WSs. Forty percent of eyes still maintained the accommodation amplitude level at 90 minutes. The mean near logarithm of the minimum angle of resolution VA immediately after application of WSs and at 90 minutes significantly improved relative to the near acuity values after simple eyelid closure. CONCLUSION: Periocular warming was found to be associated with increases in subjective and objective accommodations, with a concomitant improvement in near VA. Periocular warming with disposable WSs is a simple and effective method of increasing near work-related ergonomy. Yeah, the Bates people call it sunning and were ridiculed for the idea but when I tried it in my early 20's I presumed it was simply a way of heating the eyes, increasing blood flow da da but this below proves how often we can make the mistake of throwing out the ranting baby with the bathwater. > http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1 5885788&dopt=Abstract > [quoted text clipped - 44 lines] > warming with disposable WSs is a simple and effective method of > increasing near work-related ergonomy. >Yeah, the Bates people call it sunning and were ridiculed for the idea >but when I tried it in my early 20's I presumed it was simply a way of >heating the eyes, increasing blood flow da da but this below proves how >often we can make the mistake of throwing out the ranting baby with the >bathwater. From what I understand, Bates was claiming to cure myopia which is a whole different ballgame from pseudomyopia. Ann >> http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1 5885788&dopt=Abstract >> [quoted text clipped - 44 lines] >> warming with disposable WSs is a simple and effective method of >> increasing near work-related ergonomy. > From what I understand, Bates was claiming to cure myopia which is a > whole different ballgame from pseudomyopia. I've read the entire book (PSWG) and I don't think he distinguished between them. -MT > http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1 5885788&dopt=Abstract > [quoted text clipped - 44 lines] > warming with disposable WSs is a simple and effective method of > increasing near work-related ergonomy. I fail to see how this study relates to the thread title of pseudo myopia and accommodative spasm. The warming increased accommodative amplitude and near acuity slightly but the study authors did not measure far acuity, far refraction, accommodative facility or accommodative spasm so this study has nothing to say about pseudomyopia. Dr Judy > I fail to see how this study relates to the thread title of pseudo > myopia and accommodative spasm. The warming increased accommodative > amplitude and near acuity slightly but the study authors did not > measure far acuity, far refraction, accommodative facility or > accommodative spasm so this study has nothing to say about > pseudomyopia. Where would you assume the accommodative amplitudes went, or--conversely--that the post-warming amplitudes came from? It seems a reasonable hypothesis that--since the periocular warming returns some AA--they were "locked up" in some kind of "short-term hypertonicity" (ie, cramp/spasm), no? > > I fail to see how this study relates to the thread title of pseudo > > myopia and accommodative spasm. The warming increased accommodative [quoted text clipped - 9 lines] > returns some AA--they were "locked up" in some kind of "short-term > hypertonicity" (ie, cramp/spasm), no? No. Just as valid to assume that warmth gave the ciliary muscle a little extra range of motion so that the total amplitude increased. Or that the warmth made accommodation more accurate and the usual lag disappeared. Given that the study said near VA improved, it seems that total amplitude increased, not just a moving around of amplitude. Although, in pre presbyopic subjects increasing amplitude should not increase VA (principle of enough is enough and more is not better). Maybe the warmth decreased pupil size and increased depth of focus. Anyway, the only way you could say that pseudo myopia was decreased would be if the researchers had measured distance refraction pre and post treatment. They didn't do that so it is not possible to say whether it was affected or not. Dr Judy They also measured pupil size. I would like to know if the pupil size changed. If it got smaller, it may have resulted in a slight increase in depth of field. > > > I fail to see how this study relates to the thread title of pseudo > > > myopia and accommodative spasm. The warming increased accommodative [quoted text clipped - 26 lines] > > Dr Judy
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