摘要:

Only few studies are available on changes in corneal sensitivity during pregnancy, and most of the earlier work was done with instruments which gave only a rough approximation of the threshold of corneal sensitivity to touch. The new esthesiometer developed by Draeger permits, for the first time, an exact and reproducible determination of the threshold of corneal sensitivity to touch. We studied corneal sensitivity in 86 pregnant women between the 13th and 40th week of gestation. The thresholds were significantly higher in the study group as compared to a control group of non-pregnant women. The decrease in corneal sensitivity was not related to duration of gestation, weight gain during pregnancy or mean arterial pressure at the time of examination. Possible mechanisms responsible for changes in corneal sensitivity in pregnancy are discussed.

ISSN:0030-3755    

DOI:10.1159/000309139

出版商:S. Karger AG    

年代:1981

数据来源: Karger

摘要:

A new typical case of the François’ dyscephalic syndrome is reported and the importance of the skin involvement is stressed. Connective tissue lesions and elastin changes were demonstrated by histological and histochemical examinations, revealing anomalies even in apparently healthy skin. These changes may be due to a primary disturbance in the metabolism of the glycoproteins.

ISSN:0030-3755    

DOI:10.1159/000309140

出版商:S. Karger AG    

年代:1981

数据来源: Karger

摘要:

A case of neuroretinitis of unknown origin and of favorable recovery is presented. Clinical and fluorescein angiography findings are discussed.

ISSN:0030-3755    

DOI:10.1159/000309141

出版商:S. Karger AG    

年代:1981

数据来源: Karger

ISSN:0030-3755    

DOI:10.1159/000309142

出版商:S. Karger AG    

年代:1981

数据来源: Karger

摘要:

Ophthalmodynamometric data based on 5 patients with low-tension glaucoma and two other groups with either chronic simple glaucoma, or carotid stenosis insufficiency, respectively, are reported. The results obtained confirm the stenosis insufficiency of the ophthalmic carotid region in all three groups, differing only in its characteristics.

ISSN:0030-3755    

DOI:10.1159/000309143

出版商:S. Karger AG    

年代:1981

数据来源: Karger

摘要:

PDS (polydioxanone suture), a new synthetic absorbable suture, was used in 21 patients undergoing cataract surgery. It still retains 25 % of its tensile strength at 42 days but absorption takes 130–180 days. 1 braided coated and 1 monofilament PDS were adequate as conjunctival sutures but offered no advantage over available materials. 0.5 monofilament PDS was superior in handling qualities to 0.4 virgin silk. It does not need to be removed but retains tensile strength for longer than other absorbable sutures.

ISSN:0030-3755    

DOI:10.1159/000309144

出版商:S. Karger AG    

年代:1981

数据来源: Karger

摘要:

If, in a diaphanous homogeneous medium with a given refractive index, areas with different refractive indices develop, a plane between these areas will become visible provided the difference between the local refractive indices suffices for reflection of light. Conversely, where such planes are observed, a difference between the refractive indices on either side may be assumed. Finally, change of the localization of the planes indicates alteration of the refractive indices. The above approach is applicable to slitlamp images of the lens.

ISSN:0030-3755    

DOI:10.1159/000309145

出版商:S. Karger AG    

年代:1981

数据来源: Karger

摘要:

The two main possibilities of error of the generally used methods for artificial lens implantation after preoperative ultrasound measurements and calculations are discussed. By using our additional special calibration to the ultrasonic equipment we can predict the postoperative refraction with an error of ± 0.5 D corresponding to an uncorrected vision of about 20/40 and better. Procedures based on the validity of Knapp’s law may lead to optical pitfalls, since Knapp’s law is only valid for eyes with variable eye length, while it is known that human phakic, pseudophakic and aphakic eyes have a constant eye length. Three principles for the precalculated artificial lens implantation are published and results of refractive balances are given.

ISSN:0030-3755    

DOI:10.1159/000309146

出版商:S. Karger AG    

年代:1981

数据来源: Karger

摘要:

A new reading aid (called ‘kraspegig’) for patients with macular blindness is described. It is based on the principle that, in peripheral vision, our attention is strongly drawn to moving objects. Accordingly, it sets the reading matter moving with respect to the patient’s retina. Its essential part is a patterned mask into which is cut a window through which a few words of text can be seen. As the mask is slid along, the patient follows it with his eyes, so that the text lags behind. A magnifier is part of the device.

ISSN:0030-3755    

DOI:10.1159/000309147

出版商:S. Karger AG    

年代:1981

数据来源: Karger

摘要:

16 healthy and ophthalmologically normal truck drivers are tested with a battery of tests according to the routine described in the following paper. This includes isopter perimetry, colour discrimination, recovery of sensitivity during dark adaptation and refraction at both far and near points, in order to record night myopia as well as night presbyopia. The ranges of individual variability are reported. As far as refraction is concerned, it seems of interest to stress the individual differences in a sort of ‘transient anisometropia’ under incoming twilight.

ISSN:0030-3755    

DOI:10.1159/000309148

出版商:S. Karger AG    

年代:1981

数据来源: Karger