摘要:

Initial diagnosis of one subject in an experimental series showed that this observer could not discriminate large disparities (greater than 1/2°). Nevertheless, the subject was still retained in the series of experiments in order to determine the effects of extensive practice upon the performance in the diagnostic test. Following more than one thousand trials without feedback, the subject's performance improved from stereoblindness to stereoanomaly.

ISSN:0093-7002    

出版商:OVID    

年代:1974

数据来源: OVID

摘要:

The total protein concentration of daily tear samples from eight male subjects, before lens placement and after lenses had been worn for a specific period, were monitored. The resulting transient instability in protein concentration and the associated physiological implications are discussed.

ISSN:0093-7002    

出版商:OVID    

年代:1974

数据来源: OVID

摘要:

A 5,000 watt xenon-mercury high pressure lamp was used to produce a continuous ultraviolet spectrum for the human eye. Instrumentation, calibrating and experimental procedures are described. A total of 39 human eyes were exposed at eleven different 10 mm wavebands in the 220 to 310 mm wavelength range Human data were compared to rabbit and primate data

ISSN:0093-7002    

出版商:OVID    

年代:1974

数据来源: OVID

摘要:

A unique and advantageous method for determining the paraxial properties of an optical system is described. Using matrix algebra, any optical array Can be fully described by a series of 2 x 2 matrices. Several sample systems of optometric interest, leuses and the schematic eye, are analyzed by means of this technique.

ISSN:0093-7002    

出版商:OVID    

年代:1974

数据来源: OVID

摘要:

This paper studies the effect of drop ball testing through a protective plastic envelope or film, and of the use of a tube to guide the ball in its fall to the lens. In addition, comments are made on the special dispensation given by the Food and Drug Administration to the design testing of raised ledge multifocals and other lenses, rather than drop ball testing each lens individually.

ISSN:0093-7002    

出版商:OVID    

年代:1974

数据来源: OVID

摘要:

The corneal trauma induced by a recently developed technique for performing electraretinography was evaluated and compared to the trauma observed while using the standard technique for performing the test. The use of a hydrophilic contact lens is evaluated as an alternative to the use of a topical corneal anesthetic before electrode application. Less corneal trauma was observed when the hydrophilic lens was used as a cushion for the electrode.

ISSN:0093-7002    

出版商:OVID    

年代:1974

数据来源: OVID

摘要:

The basic mechanisms by which a layer of surface compression is created in a lens are briefly outlined. The influence of this compression layer upon the performance strength of the lens is explained. The different mechanisms of failure of a lens, under impact are also described.

ISSN:0093-7002    

出版商:OVID    

年代:1974

数据来源: OVID

摘要:

A review of literature on the ocular toxicity of the anti-tuberculosis drug Ethambutol Hydrocbloride. Ethambutol Hydrochloride is currently extensively used in tuberculosis therapy, so this review should be of interest to those who are concerned with patients under chemotherapy for tuberculosis.

ISSN:0093-7002    

出版商:OVID    

年代:1974

数据来源: OVID

摘要:

The Diodewand is a new device designed for tangent screen visual field testing. It represents a further evolutionary step from the Lumiwand, the first self-luminous testing wand. The Diodewand is self-luminous and also flickers with a rate that is variable. In preliminary tests on several normal patients, the Diodewand enabled the measurement of larger and more reliable fields than the standard matte target. The Diodewand produced larger and slightly more reliable fields than the Lumiwand. Normal and low vision patients preferred the Diodewand to both of the other instruments with regard to the ease with which it allowed them to make judgments of “just appeared” or “just disappeared.”

ISSN:0093-7002    

出版商:OVID    

年代:1974

数据来源: OVID

摘要:

One subject manifesting corneal striae after wearing hydrophilic lenses was observed for a 600-day period. It was found that the striae did not affect comfort or vision and were reversible throughout the entire period of the study. A discussion, description and rationale for the presence of the striae is given.

ISSN:0093-7002    

出版商:OVID    

年代:1974

数据来源: OVID