摘要:

AbstractThe impact of the Helling-Carey court decision on the use of tonometry is examined. It is found that highly significant increases in tonometry use occurred soon after the court decision. However, a cause-effect relation is not proven.

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

AbstractMalignant myopia is a major cause of blindness, yet compared with cataract, glaucoma, or diabetic retinopathy, this condition has received little attention from clinical investigators. This study explores existing health and geophysical records in search of clues that might suggest directions for further research into the etiology of blinding myopia. From the environmental data available for analysis, annual hours of sunshine emerged as the factor with the strongest (inverse) association with malignant myopia. Using data from the 14-state Model Reporting Area for Blindness, a case-referent study of this factor revealed both sex and age-birth year modifications of this effect. Relatively more blindness due to malignant myopia occurred among women in low sunshine regions and among men in high sunshine regions. The effect among women appeared during middle age (45+, or born before 1926) but among men was not seen until later (age 65+ or born before 1906).

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

AbstractThe National Aeronautics and Space Administration (NASA) requested solution of a visual acuity problem that presbyopic astronauts had when viewing an alert system visual display attached to their Space Shuttle suits. Solutions were analyzed in the context of constraints which prohibited major modifications of the suits. The solution to the problem was to mount Fresnel lens strips on the helmet so that presbyopic astronauts could view the visual display clearly.

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

AbstractThis report describes the design of a variable focus telescopic system for a low vision patient who wanted to be able to see at numerous fixed working distances. A simple and effective means of mounting the telescope onto an existing spectacle lens is described. The discussion presents an analysis of the optical principles used and a formula for determining the equivalent power of a nearpoint telescope.

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID

摘要:

AbstractBy use of an optical comparator and the two formulas given here one can calculate the contact angle without use of an instrument designed specifically for that purpose.

ISSN:0093-7002    

出版商:OVID    

年代:1982

数据来源: OVID