Journal of The British Contact Lens Association最新文献_第7页

Comparison of the depths of focus with the naked eye and with three types of presbyopic contact lens correction 三种老花眼隐形眼镜与裸眼对焦深度的比较

Journal of The British Contact Lens Association Pub Date : 1995-01-01 DOI: 10.1016/S0141-7037(95)80023-9

MSc Athena Plakitsi, PhD W. Neil Charman

{"title":"Comparison of the depths of focus with the naked eye and with three types of presbyopic contact lens correction","authors":"MSc Athena Plakitsi, PhD W. Neil Charman","doi":"10.1016/S0141-7037(95)80023-9","DOIUrl":"10.1016/S0141-7037(95)80023-9","url":null,"abstract":"<div>Experiments are described in which monocular, high-contrast, letter acuity was measured as a function of target vergence (effective distance) for six simulated presbyopic subjects, who were placed under cycloplegia with a 4mm diameter artificial pupil. Measurements were made with the naked eye or single-vision spectacle lens corrected eye, and with three types of simultaneous-vision (simultaneous image) ‡ presbyopic contact lens correction: a centre-near biofocal; a centre-distance varifocal or progressive power lens; and a centre-mear varifocal. Results show that all designs usefully improve the range of distances over which an adequate standard of vision is achieved, the depth of focus typically being increased by about 1–2 dioptres, depending upon the criterion used to define depth of focus. Peak visual acuity at optimal focus is, however, slightly worse with the presbyopic contact lens corrections than with the naked or spectacle-lens corrected eye. Intersubject differences suggest that individual lens characteristics, the aberrations of the individual eye and lens centration may all play a role in determining the optical effectiveness of any particular design.</div>","PeriodicalId":100842,"journal":{"name":"Journal of The British Contact Lens Association","volume":"18 4","pages":"Pages 119-125"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0141-7037(95)80023-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82333548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 49

Survey of the use of contact lenses in a group ofuniversity students in Tianjin, China 中国天津一组大学生隐形眼镜使用情况调查

Journal of The British Contact Lens Association Pub Date : 1995-01-01 DOI: 10.1016/S0141-7037(95)80044-1

B Optom Pauline Cho , PhD Brian Brown , Feng Lian Li

引用次数: 2

Publication guidelines and instructions to authors 出版指南和对作者的说明

Journal of The British Contact Lens Association Pub Date : 1995-01-01 DOI: 10.1016/S0141-7037(95)80028-X

引用次数: 0

Orthokeratology — an alternative to excimer laser? 角膜塑形术-准分子激光的替代品?

Journal of The British Contact Lens Association Pub Date : 1995-01-01 DOI: 10.1016/S0141-7037(95)80035-2

Anthony J. Phillips

引用次数: 14

Contact lenses: beyond refractive error 隐形眼镜:超越屈光不正

Journal of The British Contact Lens Association Pub Date : 1995-01-01 DOI: 10.1016/S0141-7037(95)80021-2

Richard M. Hill

引用次数: 0

Disposable contact lenses as therapeutic devices 一次性隐形眼镜作为治疗设备

Journal of The British Contact Lens Association Pub Date : 1995-01-01 DOI: 10.1016/S0141-7037(95)80014-X

PhD, FBCO Martin P. Rubinstein

引用次数: 8

In vivo wettability of high Dκ RGP materials 高Dκ RGP材料的体内润湿性

Journal of The British Contact Lens Association Pub Date : 1995-01-01 DOI: 10.1016/S0141-7037(95)80043-3

PhD, FBCO, FAAO Michel Guillon , PhD, FBCO Jean Pierre Guillon , BSc Dipti Shah , MST Sylvie Bertrand , B Optom, FAAO Timothy Grant

{"title":"In vivo wettability of high Dκ RGP materials","authors":"PhD, FBCO, FAAO Michel Guillon , PhD, FBCO Jean Pierre Guillon , BSc Dipti Shah , MST Sylvie Bertrand , B Optom, FAAO Timothy Grant","doi":"10.1016/S0141-7037(95)80043-3","DOIUrl":"10.1016/S0141-7037(95)80043-3","url":null,"abstract":"<div>This study compared the in vivo wettability of four high Dk rigid gas permeable (RGP) materials (Aquila, Menicon, Super EX, Quantum 1 and Quantum 2). The study design was a double-masked right/left eye comparison of 6 months' duration where the lenses were worn on a daily-wear basis. It involved three experimental groups, each using Aquila in one eye and one of the other materials in the fellow eye. The main conclusions obtained are as follows: The in vivo intrinsic wettability, and its alteration during a 6-month period of wear, was similar for all four high Dk materials tested. The in vivo characteristics of these materials were not different from those of lower Dk materials, hence increasing Dk does not result in reduced wettability as suspected by some practitioners. In vivo wettability is highly patient dependent, and so its ongoing monitoring during routine practice is necessary for optimal patient management. In vivo wettability is affected by lens wear; after 6 months' wear the stability of the tear film at the front of the contact lens was significantly reduced and the level of surface contamination increased compared with dispensing. The notion of planned replacement should be extended to RGP contact lenses. Replacement frequencies of 6, or even 3 months would be of benefit for a significant number of patients.</div>","PeriodicalId":100842,"journal":{"name":"Journal of The British Contact Lens Association","volume":"18 1","pages":"Pages 9-15"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0141-7037(95)80043-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83463545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Contact lens complications presenting to a 24-hour casualty department 隐形眼镜并发症出现在24小时急诊室

Journal of The British Contact Lens Association Pub Date : 1995-01-01 DOI: 10.1016/S0141-7037(95)80033-6

BSc, MBCO Alison J. Hood, MBBS, DO, MRCOphth, FRCS(Edin) Ahmed Sadiq

引用次数: 0

Author index, volume 17 (1994) 作者索引，第17卷(1994)

Journal of The British Contact Lens Association Pub Date : 1995-01-01 DOI: 10.1016/S0141-7037(95)80050-6

引用次数: 0

Timonthy R. Golding, PhD 1963–1995 timothy R. Golding博士，1963-1995

Journal of The British Contact Lens Association Pub Date : 1995-01-01 DOI: 10.1016/S0141-7037(95)80016-6

PhD Timothy R. Golding

引用次数: 0