摘要:

Tonometric measurements of albino rabbits were determined with and without the use of a gel lens while the intraocular pressure (IOP) was manometrically controlled. The IOP was evaluated over a 50-mm Hg range of pressures. A high degree of correlation between measurements made with and without a gel lens was found. The results suggest that the technique may have clinical applications on patients for whom a corneal anesthesia is contraindicated or on whom repeated tonometry or tonography might cause corneal trauma.

ISSN:0093-7002    

出版商:OVID    

年代:1976

数据来源: OVID

摘要:

In an attempt to describe the use and usefulness of closed-circuit televisions (C.C.T.V.), a preliminary follow-up study of 27 veterans was undertaken by the Western Blind Rehabilitation Center. The veterans had been loaned C.C.T.V.'s by the Veterans Administration and represented a wide range of ages, backgrounds, and pathologies. On the basis of the present data, it is concluded that C.C.T. V. significantly improve the functioning of the majority of users and that this improvement appears to be a long-term benefit.

ISSN:0093-7002    

出版商:OVID    

年代:1976

数据来源: OVID

摘要:

There have been a number of reports on the effects of early occlusion on the visual system of cats, monkeys, and humans. In the present paper, a patient with amblyopia resulting from prolonged early occlusion in the treatment of strabismus is described, and implications for management of early strabismus are discussed.

ISSN:0093-7002    

出版商:OVID    

年代:1976

数据来源: OVID

摘要:

The rotation lathe-cut Hydro Curve™ gel contact lens was measured on six eyes to evaluate the parameters that influence lens rotation and to determine if this lens could be used to correct astigmatism. Of the 72 observations made, 73.6% showed some lens rotation, and 33.4% of the sample rotated more than 5 degrees per 10 blinks. Of the observations in which rotation was noted, 88.7% were encyclorotation. These results are similar to those found for spin-cast hydrogel lenses. None of the lens parameters evaluated seemed to be related to lens rotation, whereas the eye parameters studied were. Lenses were more likely to rotate on eyes with smaller corneal diameters, smaller palpebral apertures, and corneal curvatures steeper than 43.00 DK (χ2,N= 72,p< 0.05).Our findings indicate that some method of lens stabilization will be needed before lathe-cut hydrogel lenses can be used to effectively correct astigmatism.

ISSN:0093-7002    

出版商:OVID    

年代:1976

数据来源: OVID

摘要:

A matrix approach to decentration problems is presented which reduces the common decentration problems of ophthalmic optics to simple matrix multiplications. The formalism also leads to an alternative derivation of Thomson's formulas for obliquely crossed spherocylindrical tenses.

ISSN:0093-7002    

出版商:OVID    

年代:1976

数据来源: OVID

摘要:

In an unselected study, Modified Clinical Technique screening plus keratometry was done on 398 American Indian grade school children. The results are compared to screening results for Caucasian grade school children.

ISSN:0093-7002    

出版商:OVID    

年代:1976

数据来源: OVID

摘要:

Acetone is used as a solvent for chemicals in skin sensitization studies. Its low cost, high solvent powers, and comparative lack of toxicity make it one of the most widely used industrial solvents. Absorption of acetone through the skin i is not considered hazardous; however, in an earlier study we found that acetone caused cataracts in a large group of guinea pigs when small multiple doses were administered either, topically or intracutaneously on the backs of these animals. No cataracts were found when two rabbits were tested. The purpose of the present study is to repeat the earlier study using more rabbits. Here, none of the 10 experimental rabbits or the 10 control rabbits developed any lens abnormalities. Those drugs and toxic substances that have produced cataracts in rabbits are described.

ISSN:0093-7002    

出版商:OVID    

年代:1976

数据来源: OVID

摘要:

The ophthalmic literature dealing with diseases of the optic nerve, tracts, and visual cortex was reviewed for the period September 1973 to November 1974. Eighteen papers dealing with topics of interest to optometrists have been abstracted. Principal subjects include: relation of central serous retinopathy to pregnancy, a stimulating discussion of the role of elastic tissue degeneration in formation of angioid streaks, methods of assessing internal carotid artery disease, ophthalmoscopy versus tangent screen evaluation, stereoacuify as a useful tool in detecting monocular problems, advances in head X-ray, and, lastly, developments in objective assessment of the nerve head and central retinal artery.

ISSN:0093-7002    

出版商:OVID    

年代:1976

数据来源: OVID

ISSN:0093-7002    

出版商:OVID    

年代:1976

数据来源: OVID

ISSN:0093-7002    

出版商:OVID    

年代:1976

数据来源: OVID