{"title":"Tear pH, air pollution, and contact lenses.","authors":"S Andrés, M L García, M Espina, J Valero, O Valls","doi":"10.1097/00006324-198808000-00006","DOIUrl":null,"url":null,"abstract":"<p><p>We analyzed the tear pH of a random sample of 100 subjects, divided into 3 groups according to the stability of their precorneal tear film (normal eyes, borderline; and dry eyes). The average pH value obtained was 7.52. The pH for borderline and dry eyes was higher than for normal eyes. The purpose of this study was to determine the influence of air pollution, specifically sulfur dioxide (SO2), on the tear pH. We found that air pollution affected the lacrimal pH, which decreased when the atmospheric SO2 increased. Finally, we studied the effect of soft contact lens wear on tear pH after 7 days of contact lens adaptation by assessing the tear pH decrease. We took into account the influence of the sex and age of subjects on the results obtained.</p>","PeriodicalId":7700,"journal":{"name":"American journal of optometry and physiological optics","volume":"65 8","pages":"627-31"},"PeriodicalIF":0.0000,"publicationDate":"1988-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1097/00006324-198808000-00006","citationCount":"37","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"American journal of optometry and physiological optics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1097/00006324-198808000-00006","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 37
Abstract
We analyzed the tear pH of a random sample of 100 subjects, divided into 3 groups according to the stability of their precorneal tear film (normal eyes, borderline; and dry eyes). The average pH value obtained was 7.52. The pH for borderline and dry eyes was higher than for normal eyes. The purpose of this study was to determine the influence of air pollution, specifically sulfur dioxide (SO2), on the tear pH. We found that air pollution affected the lacrimal pH, which decreased when the atmospheric SO2 increased. Finally, we studied the effect of soft contact lens wear on tear pH after 7 days of contact lens adaptation by assessing the tear pH decrease. We took into account the influence of the sex and age of subjects on the results obtained.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
