摘要:

To evaluate more carefully the previously reported relation between myopia and dental caries, the refractive status and dental-caries experience of 196 high school students were evaluated. Statistical analysis was done by chi-square and computer-based multiple regression analysis. No statistically significant relation between the two conditions was found.

ISSN:0093-7002    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

Phoria, vergence, and fixation-disparity were measured at near working distances for a nonclinical sample of 3rd-yr optometry students. A questionnaire divided the sample into 33 symptomatic and 44 asymptomatic subjects. Discriminant analysis was used to determine which clinical measures best predicted the group to which each subject belonged. Sheard's criterion was a good discriminator for exo deviations, and a variant of Percival's criterion was good for eso deviations. Fixation-disparity variables proved to be valuable diagnostically. The best fixation-disparity measures were the curve slope, curve type, and amount of fixation disparity.

ISSN:0093-7002    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

The center thicknesses of 184 hydrogel lenses–Naturvue, Hydrocurve (thin hefilcon A), Soflens, Aquaflex, and AOsoft–were measured using the Radiuscope in combination with the hydrogel lens platform. The measured center thickness of each lens was compared with the manufacturer's stated center thickness for a lens of the same parameters. In all cases, the mean difference between the measured center thickness and stated center thickness exceeded 0.01 mm, which, based on previous study, was the expected variation in the technique. The moan difference between the measured center thickness and stated center thickness of the various manufacturers' lenses ranged from 0.012–0.030 mm.

ISSN:0093-7002    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

Methods are presented for screening and measuring central and peripheral visual fields as part of a vision examination. The paper describes static quantitative perimetry for single and multiple targets, the Visual Field Analyser, and kinetic and combined static and kinetic perimetry.

ISSN:0093-7002    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

Ophthalmic materials from 11,677 spectacle-prescription orders were evaluated during an 18-mo period in a university optometry clinic. Five percent of the orders received were not acceptable based on criteria stemming from the ANSI-Z80.1–1972 standards. Almost two-thirds of these rejections were lens related. Frame-related rejections were predominantly due to gross human error. Rejection rate and delivery time varied widely among the supplying laboratories. Rejection rate did not decrease with increased delivery time. Since notifying the laboratories of our results, the percentage of unacceptable orders has decreased.

ISSN:0093-7002    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

Normal anatomical variations of the eye are a constant source of interest to the clinician. This is particularly true for the optic-nerve head, where neural, vascular, and supportive tissue converge, each with its own variations. Such diverse anomalies as cleft palate, reduced visual acuity, visual-field loss, and distortions of the optic-nerve head may all be related to a single factor affecting embryonic or later development. This paper presents a number of nerve-head malformations in the context of their embryonic development, clinical appearance, and implications for visual function.

ISSN:0093-7002    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

An electrode for electroretinography was developed that fits over the patient's lower lid. The electrode incorporates a platinum strip embedded in a piece of shaped plexiglass. The electrode was standardized for clinical use by comparing ERG recordings from this platinum lid electrode with those recorded from a Burian-Allen electrode. The a- and b-wave implicit times and amplitudes were measured in four subjects, using both electrodes under varying luminance conditions, to provide a measure of the validity of the platinum lid electrode. The same experimental procedure was repeated five times on two individuals to provide a measure of the reliability of both electrodes. Results indicate amplitudes approximately 65% of those recorded with a Burian-Allen electrode but which are otherwise in good agreement.

ISSN:0093-7002    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

The history, theory, and practical application of automated perimetry are discussed. Optometrists are urged to consider increasing the efficiency of their examination procedures by using automated field testing–in particular, automated perimetry.

ISSN:0093-7002    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

Relatively mild ocular trauma may cause lesions within the anterior chamber which are easily overlooked. The frequent onset of secondary glaucoma after such injuries emphasizes the importance of carefully evaluating the anterior chamber for the presence of hyphema, iridodialysis, and anterior-chamber recession. A case is reported in which relatively mild trauma caused iridodialysis, anterior-chamber recession, and tearing of the iris stroma and pupillary margin.

ISSN:0093-7002    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

A 10-yr-old partially sighted, one-eyed patient with 10/200 distance acuity and no experience in using an optical aid was able to read successfully by using a 10x Selsi telescope with a +3.50 D reading cap, an easel to hold the material upright and free his hands to hold the telescope and write, and a high-intensity desk lamp to provide adequate retinal illumination through a congenital cataract.

ISSN:0093-7002    

出版商:OVID    

年代:1978

数据来源: OVID