ISSN:1040-5488    

出版商:OVID    

年代:1998

数据来源: OVID

ISSN:1040-5488    

出版商:OVID    

年代:1998

数据来源: OVID

ISSN:1040-5488    

出版商:OVID    

年代:1998

数据来源: OVID

ISSN:1040-5488    

出版商:OVID    

年代:1998

数据来源: OVID

ISSN:1040-5488    

出版商:OVID    

年代:1998

数据来源: OVID

ISSN:1040-5488    

出版商:OVID    

年代:1998

数据来源: OVID

ISSN:1040-5488    

出版商:OVID    

年代:1998

数据来源: OVID

摘要:

Posterior lenticonus is a protrusion of the posterior capsule and cortex into the vitreous. The etiology is widely debated because of the rare nature of the condition. Lenticonus can present with concurrent ocular conditions, which can disrupt normal visual development. Currently, the only treatment option for posterior lenticonus is lensectomy, which may still have a reduced chance of visual success secondary to the associated disease. Although strabismus and amblyopia are commonly associated, keratoconus has not previously been reported with unilateral posterior lenticonus. Considering treatment of the associated condition may allow the patient to delay or forego surgical intervention.

ISSN:1040-5488    

出版商:OVID    

年代:1998

数据来源: OVID

摘要:

Background. Age-related macular degeneration (ARMD) is one of the leading causes of severe visual impairment among older Americans. Several hypotheses have been proposed regarding the pathogenesis of ARMD. The possible association of cigarette smoking and ARMD remains controversial. Methods. Studies concerning the relationship between cigarette smoking and ARMD are identified through the use of Vision Articles Online and PubMed. Articles published since 1970 are reviewed. Results. The literature reviewed strongly supports a link between smoking and ARMD. Conclusions. The identification of smoking as a risk factor can lead to early intervention. Such intervention may lessen visual loss from this disease, which has limited medical treatment options.

ISSN:1040-5488    

出版商:OVID    

年代:1998

数据来源: OVID

摘要:

Background. Retrospective studies have indicated that myopic children with nearpoint esophoria experienced slower myopia progression if they wore bifocal glasses rather than single-vision glasses. A small, 18-month clinical trial also supported that finding, but the results were not statistically significant. The Myopia Progression Study was funded by the National Eye Institute to test more rigorously the efficacy of bifocals, compared with single-vision glasses, in slowing myopia progression in children with nearpoint esophoria. A secondary objective of the study was to identify other variables that might influence the rate of myopia progression. This report describes the design and methods of the Myopia Progression Study and the baseline characteristics of the subjects. Methods. A 3-year, randomized clinical trial was initiated. Subjects were children between 6 and 12 years of age who were myopic (at least -0.50 D in each eye) and who demonstrated nearpoint esophoria by the von Graefe technique. Results. Eighty-two children were enrolled. After blocking by gender and clinical site (two sites), subjects were randomly assigned to one of the two treatments: correction with single-vision spectacle lenses or correction with bifocal lenses having a +1.50 D add in a flattop segment. The average degree of myopia at baseline was –2.31 D (SD = 1.31 D). Conclusion. This clinical trial can be expected to determine the effectiveness of bifocal glasses in slowing the progression of myopia in children with nearpoint esophoria.

ISSN:1040-5488    

出版商:OVID    

年代:1998

数据来源: OVID