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Y. Nawa, A. Nakagawa, M. Kanzaki, Y. Hara, Y. Ejima, H. Uozato; High Percentage of Peripheral Stereoagnosia in the Youth Engaged in Near Work (Temporal Youth PeripheralStereoagnosia) . Invest. Ophthalmol. Vis. Sci. 2006;47(13):3147.
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© ARVO (1962-2015); The Authors (2016-present)
In the clinical field of ophthalmology, it has been reported that the rate of stereoagnosia is 1∼3%. But, in our recent study, we meet with high percentage of peripheral stereoagnosia among the young people engaged in near work. This phenomenon will be the serious problem in social life.
Materials and Methods: :
We examined the central and peripheral stereopsis on 129 businessmen aged 20’s to 50’s who are engaged in near works such as at personal computer and close examination work(group1), and also on 30 medical students aged 20’s who are busy in preparing for the state examination(group2), . In this study, we used Binocular Eye Tester ‘OPUS–OF’(WOC Co.,Ltd, Japan), to examine peripheral stereopsis, and Titmus stereotest or Reindeer test to examine central stereopsis. The age, refractive error, eye position, working time, and level of eye fatigue were analyzed in relation to peripheral stereoagnosis.
In both groups, about half of the participants(group1:50.4%, group2:46.7%) showed peripheral stereoagnosia, whereas all of them showed good central stereopsis. On the other hand, most of older people over 50’s showed good stereopsis. Age and near working time were the significant (P<0.05) risk factors of peripheral stereoagnosis.
It is surprising that many young people engaged in near work had peripheral stereoagnosis. This phenomenon relates to the visual function of peripheral perception. This phenomenon may have a significant relationship to the traffic and sports accidents or mistakes in precision work.We are trying to investigate the effects of contrast and pattern size by psycophysical methods. We propose to call this phenomenon as ‘Temporal Youth Peripheral Stereoagnosia’
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