摘要:

The results are reported of 38 ultrasonographicin vivomensurations of intraindividual differences in axial thickness between a cataractous lens in one eye and a biomicroscopically clear or slightly cataractous lens (incipient deep cortical opacity) in the other. Obviously intumescent cataractous lenses were excluded.In general, the cataractous lens wasthinnerthan the contralateral clear or slightly cataractous lens.Large decreases in lens thickness appeared in lenses with thecapsulenear opacitiesof posterior subcapsular cataract (PSC) + anterior capsular/subcapsular opacity (ACSCO). PSC was more closely correlated to lens thinning than was ACSCO.Nuclear cataract very often occurred in thin lenses, but did not appear to cause lens thinningper se.Deep cortical opacity was not associated with lens thinning.The present results contributed to our argumentation that the decrease in lens thickness is due to a leak of lens material through the ‘lens membrane’ beside a possible cessation of growth of the lens fib

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1979.tb06653.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

A family with “ant‐egg” cataract in three generations is described. The cataract is congenital, probably of autosomal dominant inheritance. Light microscopy of the ant‐eggs showed that they are made up of a peripheral zone of lens material and a large almost homogenous centre. Element analysis by X‐ray spectrophotometry showed a high content of calcium and phosphorus in the centre. The cataract has been easy to operate on and the postoperative visual results have

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1979.tb06654.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Six cases representing different stages of cataract formation secondary to eye trauma were subjected to quantitative microradiographic or electron microscopic examination. Anterior and posterior subcapsular cataracts were found to contain extensively swollen lens fibers in the subcapsular cortex. Microradiographic measurements revealed a reduced concentration of dry mass in the subcapsular cortex around the whole circumference of the lens. The inner cortex and the nucleus appeared normal both micro‐radiographically and electron‐microscopically.Two of the examined cases had an opaque‐cataract membrane and one had a Soemmerring's ring. The opaque membranes consisted of irregular masse of degenerated lens fiber material as well as regenerated lens epithelial cells. A wide range of dry mass concentration was found in the opaque membrane that was studied microradiographically. Alterations in morphology and dry mass concentration are more than sufficient to explain the development of opacification in traumatic cat

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1979.tb06655.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

The late complications of corneo‐scleral wound healing after the 15th postoperative day were recorded in 108 routine adult cataract operations using 7–0 polyglycolic acid (Dexon®) sutures and compared with 80 routine adult cataract operations using 9–0 monofilament nylon (9–10 Ethilon Nylon®) sutures.In 37 eyes of the 7–0 Dexon group filtrating blebs, gaping of the corne‐oscleral wound, anterior chamber collapse, or decrease in the intraocular pressure were observed compared with one filtrating bleb in the 9–0 nylon group. The majority of late complications occurred 22 to 42 days after surgery. Ten filtrating blebs remained after a 5 months' follow‐up period. The most probable cause of the late complications in corneo‐scleral wound he

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1979.tb06656.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Infrared pupillography has been performed on 9 male cadets taking part in a combat course lasting for 5 days. The combat course involved lack of sleep, strong physical exercise and caloric deficit. During the course pupillary size was determined after rapid adaptation to darkness and the rate of concentration and the rate of dilatation after stimulation of the opposite eye with light was determined. Dilatation time increased by 50% towards the end of the course and pupillary size before light stimulation was reduced by 14%. On day 3 and 5, but not on day 1, small amplitude pupillary oscillations were observed. The speed of contraction was, however, unchanged.

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1979.tb06657.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

By using thermistors for calorimetry to monitor blood flow velocity in the choroid of the anaesthetized rabbit, it was found that an elevation of intraocular pressure reduced the choroidal blood flow. The relationship between the ratio of perfusion pressure to intraocular tension (x) and the reciprocal value of the percentage of blood flow velocity (I/y) showed a curve convex towards the pressure axis. On a log‐lin scale the graph was linear. A significant linear correlation with a coefficient of 0.965 was obtained. The regression equation was found to be log I/y = 0.48x – 1.98 ± 0.29. From the present experiments it is concluded that the vascular bed of the choroid in the rabbit is a passive one with no sign of autoregulation. The observations are discussed from the point of view of blood supply and possible damage to the optic

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1979.tb06658.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Two modes of topical pilocarpine therapy were applied to sixteen patients with open‐angle glaucoma. A pilocarpine drop medication (2% solution four times daily) was compared to a constant and continuous supply of pilocarpine by a therapeutic delivery system (Ocusert P‐40). The pressure reducing efficiency was studied in the morning and in the following four hour period of an ordinary drop medication regimen.The results indicate about equal pressure reducing properties in both high and low pre‐treatment pressure values. However, compared to pilocarpine drops, we found a statistically significant lower pressure in the morning after the Ocusert unit, especially in glaucomatous eyes with high pre‐treatment p

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1979.tb06659.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

A case of capillary haemangioma of the optic disc is reported. The ophthalmoscopic and fluorescein angiographic characteristics of the different varieties of haemangioma of the optic nerve head are discussed and the problems of treatment by photocoagulation outlined.

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1979.tb06660.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

A family with helicoidal peripapillary chorioretinal degeneration is described. This is a rare bilateral fundus affection — only seven more or less typical cases have been reported in the literature. 21 patients from the same family in four generations were examined, 10 men and 11 women. Seven men and six women showed a helicoidal affection. Of this number, there were 11 children agen from 4–17 years, six were girls of whom three had helicoidal fundus and five were boys of whom two were affected. General examination revealed nothing of particular interest. We have here a congenital hereditary fundus anomaly or minor malformation in four generations — young people with normal visual acuity who develop with age a clear tendency to invasion of the macular region by a degenerative process. This is most dangerous for the visual acuity when the atrophic helicoidal wings lie in or near the macula r

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1979.tb06661.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

The results of the ultrasonographic measurements of the ocular components in 40 emmetropic eyes from men of nearly the same age are presented and the possible relation between the axial eye length and the head size is discussed. A significant correlation was found between the axial eye length and the head circumference (P<0.001), between the axial eye length and the head length (P<0.01) and between the axial eye length and the head breadth (P<0.02). A significant correlation was also found between the axial eye length and the height of the subjects (P<0.01).It is suggested that such a correlation can explain not only the wide individual range of axial eye lengths in emmetropic eyes, but also the existing difference in axial eye length between the sexes.The mean eye length was 23.82 mm in 40 men and 23.02 mm in 10 women; both sexes were of the same age (20–30 years

ISSN:1755-375X    

DOI:10.1111/j.1755-3768.1979.tb06662.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY