ISSN:0093-7002    

出版商:OVID    

年代:1977

数据来源: OVID

摘要:

One hundred thirty-one new hydrophilic lenses made by 3 manufacturers were randomly selected from an optometry clinic for measurement and inspection. Approximately 60% of the base-curve specifications fell within the following ranges for the measured dimensions: Bausch & Lomb Soflens® contact lenses, <0.150 mm; Milton Roy Naturvue® lenses, <0.375 mm; Soft Lens Inc. Hydrocurve®, <0.225 mm. More than 65% of the lenses supplied by all the manufactures were within 0.25 D of the power specification. About two-thirds or more of all lenses had a central thickness and overall diameter within 0.04 mm and 0.40 mm, respectively, of the manufacturers' specifications, although there were notable differences among manufacturers. Most of these new lenses exhibited surface scratches and other surface defects, and many lenses had edge defects.

ISSN:0093-7002    

出版商:OVID    

年代:1977

数据来源: OVID

摘要:

Stereoacuity was measured in 30 intellectually normal and 30 mentally retarded adolescents, matched for age and sex, using the Titmus stereo test to provide nasalward and temporalward target disparities. The intellectually normal group had significantly better stereoacuity for both types of disparity. No statistically significant differences between nasal and temporal disparities were found within groups. A learning effect is shown for the mentally retarded.

ISSN:0093-7002    

出版商:OVID    

年代:1977

数据来源: OVID

摘要:

Hard contact lenses of identical specification, but manufactured from different materials, were immersed in water for up to 168 hours. The back central optic radius of each lens was periodically measured. The magnitude and time course of curvature change during hydration were found to vary with the material.

ISSN:0093-7002    

出版商:OVID    

年代:1977

数据来源: OVID

摘要:

The Goldmann, Mackay-Marg, and Non-contact tonometers were compared on 25 subjects to establish correlations between measurements of intraocular pressure by these instruments. Topical anesthetic was used for the Goldmann and Mackay-Marg readings only. Correlations were high: between the Goldmann and the Non-contact, +0.93; between the Mackay-Marg and the Non-contact, +0.81; and between the Goldmann and the Mackay-Marg, +0.87.

ISSN:0093-7002    

出版商:OVID    

年代:1977

数据来源: OVID

摘要:

The red spot phenomenon was investigated by examining sagittal sections of corroded ferrous particles embedded in the matrix of hydrogel contact lenses and also by analyzing the incidence of this contamination. The incidence of the red spot phenomenon was found to be 4.4% and was unrelated to the method of manufacture or whether the lens was new or used. The ferrous particles are of probable exogenous origin, introduced by environmental or aqueous debris, and the subsequent corrosion is accelerated by heat disinfection.

ISSN:0093-7002    

出版商:OVID    

年代:1977

数据来源: OVID

摘要:

Reaction time (RT) to scotopic flashes of light presented at various locations along the horizontal meridian near the fovea was measured. RT progressively decreased from a maximum near the fovea to a near-asymptotic value at an eccentricity of 12 deg in both the nasal and the temporal retina.

ISSN:0093-7002    

出版商:OVID    

年代:1977

数据来源: OVID

摘要:

An unusual low-vision remedy was encountered in which a simple dime-store marble was used in near vision tasks. Although the marble was found satisfactory as a low-vision aid, the patient could be better assisted with a commercially available magnifier of lesser dioptric power. This case serves to demonstrate a patient's ingenuity in independently solving his own low vision problem.

ISSN:0093-7002    

出版商:OVID    

年代:1977

数据来源: OVID

摘要:

The Pennsylvania College of Optometry, in response to an increasing demand for accountability from many segments of society, has initiated a course for first-year students on quality assurance. The course covers the concept of peer review, the principles of evaluating optometric care, the rationale of ambulatory records, and the concepts of optometric diagnosing and problem solving. We believe that the need to expose optometric students to basic quality-assurance principles will increase with future third-party payment programs and consumer-rights movements.

ISSN:0093-7002    

出版商:OVID    

年代:1977

数据来源: OVID

摘要:

Changes in the appearance of the corneal endothelial mosaic have been observed within minutes after insertion of soft contact lenses in unadapted patients. The changes consist of increased separation between cells and circumscribed black zones (endothelial “blebs”) obscuring or displacing the mosaic.

ISSN:0093-7002    

出版商:OVID    

年代:1977

数据来源: OVID