| The research background：Asthenopia is a syndrome caused by a variety of reasons,which is related to the social environment and personal physical.The patients who sufferAsthenopia can not use the eyes for a long time. With the widespread popularity ofcomputers and other devices, increasing people deal with work with eyes in closer distance.so there are more and more asthenopia patients. Asthenopia has a negative effect on thevision and life quality of modern youngsters. Asthenopia group often choose anti-fatigueeye drops to relieve visual fatigue, but this treatment can neither completely cure asthenopiapatients nor increase the body’s resistance to asthenopia. It is necessary to study the reasonsfor asthenopia and develop effective strategy to prevent eye fatigue.Objective：Investigate and analyze the reasons for asthenopia. Explore good strategieslinking better eye-used habits to corrections of eye features, which can prevent asthenopiaeffectively.Method：Evaluate their levels of asthenopia through giving different scores from124subjects, survey their habits of using eyes with questionnaire investigation and calculate theirheight and weight. Measure ocular diopter and tear quality and the accommodation andconvergence function. The counterparts, other20subjects is from the health examinationgroup. Compare two groups in terms of habits of using eyes, ocular function and physique.Analyze causes of asthenopia and put forward strategies of correcting and prventingasthenopia.124subjects were randomly divided into the intervention group (103cases) andthe control group(21cases). The former(103cases) was treated by means of correctingand preventing asthenopia; the latter(21cases) used regular drops anti-fatigue eye drops tocure asthenopia.3months later, retested the subjects and reevaluated asthenopia levels.Compare different scores before and after the implementation of the corrective strategy.Compare results of reducing asthenopia between the two groups. The data was analyzedstatistically by SPSS19.0statistical software. Statistical methods include square test andindependent samples test and paired test. Result：124cases suffering a mean asthenopia score averagely4.86±2.1. There are115(92.7%) patients who have visual fatigue in close-distance sight. The patient groupuse the computer for4.12hours per day and the control group use the computer for2.45hours a day on average, meanwhile the difference has a statisticall meaning (p=0.001). Inthe patient group,88(70.1%) subjects tend to feel asthenopia after using eyes for3hours;for78(65.0%)subjects, the distance between their eyes and the computer display is lessthan50cm;for89patients (74.1%) their computer monitor placement is not proper. In thecontrol group, the habit of using the computer is much better. The patient group withabnormal eyes function involve refractive error78cases (62.9%), dry eye31cases (25%),accommodation and convergence function abnormality48cases (38.7%). The The rate ofabnormal eyes function in the control group was significantly lower than that in patientgroup. There are54.8%of the patients with BMI index in normal range in patient groupwhile the control group has16cases (80%) of patients with BMI index in the normal range.there is significant difference between two groups (p=0.034). Bad habits of using eyes andocular dysfunction and their physical difference are the main causes of asthenopia. Thecorrecting strategy includes educating people, training the proper habits of using eyes,setting the comfortable lighting environment and relative barriers for correcting eyedisorders. After the implementation of corrective strategies in experimental group the scorefor visual fatigue is2.03±0.57, lower than that of the control group2.9±0.9. Thedifference between the two groups has a statistical meaning (t=-2.8, p=0.006). In the testgroup of corrective strategies the score for visual fatigue was2.03±0.57points lower thanthat the4.85±2.1respectively before. The difference was statistically significant (t=16,p=0.000). Totally it is effective and feasible to take the correction strategy.Conclusion：long-time using computers and other digital devices and excessive use ofeye is the primary reasons for the today’s eye fatigue. The asthenopia causes involve pooreye habits, their own poor health, refractive errors, insufficient eye accommodation andconvergence function. Therefore, we should consider all the factors and take comprehensivepreventive measures to control and cure asthenopia. it is very important to raise the publicawareness of eye care and improve occupation training and correct the eye functionaldeficiency which can significantly reduce the occurrence of asthenopia. |
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