Soemmering's ring, an aspect of secondary cataract: A morphological description by SEM

Jongebloed, W.L.; Dijk, Freerk van; Kruis, Jaroslav; Worst, Jgf

doi:10.1007/bf00154449

Cited by 13 publications

(8 citation statements)

References 3 publications

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“…Some of the recrystallization phenomena found at the cross-fracture of a Soemmering's ring [7] are similar to the recrystallization process found in the cataractous lenses. It is now known whether the local chemical environment inside the Soemmering's ring has led to these recrystallization phenomena.…”

Section: Discussionsupporting

confidence: 48%

Some aspects of cataract morphology: A SEM-study

Jongebloed

Dijk

Worst³

1988

Doc Ophthalmol

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Two lenses from patients of very advanced age with senile cataracts were processed for SEM, fractured equatorially, sputtered with Au and examined by SEM. In the cross-fracture various areas could be observed. Although the overall structure of the lens-fibres appeared to be intact, higher magnifications showed that the len-fibre material had changed into a brittle structure, with either a granular appearance or a fibrillar character. At other places clearly recrystallization of lens-fibre proteins had taken place, with the formation of finger-like substructures, sometimes organized into plate-like structures or running parallel to each other in a kind of undulating pattern. Between the various areas of chemically changed lens-fibre material certain 'canal-like' areas were found with cellular structures, the so-called 'waterclefts' or 'Wasserspalten'. Structures which, together with the chemical change in the lens proteins, account for the dramatic change in light dispersion.

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Section: Discussionsupporting

confidence: 48%

Some aspects of cataract morphology: A SEM-study

Jongebloed

Dijk

Worst³

1988

Doc Ophthalmol

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“…Firstly, very soft material mainly consisting of cells (erythrocytes) originating from the operation and remnants of, often degenerated, lens-fibre material from the original lenscataract, as reported earlier [1][2][3][4]. Secondly, fragments of regenerated capsule epithelium, sometimes relatively large pieces, sometimes connected to pieces of rather solid lens-fibre material.…”

Section: Discussionmentioning

confidence: 82%

Secondary cataract material collected with a glass cannula

et al. 1990

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Secondary cataract material from three patients, collected with a glass cannula approx. 18, 24 and 30 months respectively after operation, was prepared for SEM examination. For the soft samples this was done by filtration through a millipore filter followed by fixation and drying. The more solid material was suspended in a fixation solution, followed by centrifuging, suspension in 70% ethanol and drying on a specimen-holder. The short residence samples (18 months) showed mainly erythrocytes, some (inflammatory) cells and degenerated lens-fibre material. Most of the more solid material, which was collected more than 20 months after operation, showed fragments of (regenerated) capsule epithelium and pieces of solid lens-fibre material with fragments of capsule epithelium attached.

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“…[1][2][3][8][9][10][11][12]. Notwithstanding the sterile conditions during implantation, the released toxic components cause inflammation in the long run, so that these synthetic materials are in fact not, or not completely, biocompatible.…”

Section: Discussionmentioning

confidence: 99%

“…Secondary-cataract formation has been described by various authors in otherwise quiet eyes [1][2][3][4]. In these eyes many different products were found in the after-cataract material, e.g., remnants of lens fibres, spherical structures, sometimes with the appearance of a golfball, erythrocytes and a mucous substance.…”

Section: Introductionmentioning

confidence: 97%

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(An)aerobic bacteria found in secondary-cataract material

Kalicharan

Jongebloed

Los³

et al. 1992

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Twenty four patients, who had marked reduction of vision due to secondary-cataract developed after an ECCE, were treated by surgical cleaning of the posterior lens capsule. During this procedure globular secondary-cataract material was removed and collected for morphological examination by SEM and TEM. Fragments of various sizes and shapes, including some with a 'golf ball' structure, were seen; these closely resembled particles frequently found in cataractous lenses. In addition, in 18 patients micro-organisms were found: rod-shaped bacteria, cocci, and in 2 cases yeasts. These findings were the more remarkable because these were clinically quiet eyes with no signs of intra-ocular inflammation and cultures have been persistently negative. We imagine that these bacteria must have entered the eye during the cataract extraction and have settled there without causing an infection.

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Soemmering's ring, an aspect of secondary cataract: A morphological description by SEM

Cited by 13 publications

References 3 publications

Some aspects of cataract morphology: A SEM-study

Some aspects of cataract morphology: A SEM-study

Secondary cataract material collected with a glass cannula

(An)aerobic bacteria found in secondary-cataract material

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