摘要:

Congenital glaucoma may be associated, secondary or primary. Primary congenital glaucoma is due to the persistence in the anterior chamber angle of embryonic mesodermal tissue. Its inheritance is autosomal-recessive, sex-controlled and variable in penetrance. The treatment is surgical, goniotomy being as good as trabeculotomy.

ISSN:0030-3755    

DOI:10.1159/000309028

出版商:S. Karger AG    

年代:1980

数据来源: Karger

摘要:

A 67-year-old man with chronic keratitis was treated with a multitude of antibiotics, corticosteroids and other medicines. Despite temporary relief, perforation with iris prolapse occurred about 4 months after the initial symptoms, and the eye had to be removed. Histological examination revealed cystic bodies in the corneal stroma which could be identified as belonging to the genus Acanthamoeba. Trophozoites were seen as well. Although these amoebae are free-living organisms, occurring almost everywhere in the water and air, corneal infections are rare and have been reported only recently. It has been suggested that Acanthamoebae may only invade the tissues in the case of mixed infections or in corneas with a reduced immunological response, e.g. after corticosteroid therapy. Conservative therapy seems to have little effect, although antibiotic/antiviral/antimycotic treatment should supplement antiamoebic therapy, considering the possibility of mixed infections. Penetrating keratoplasty was indicated in most of the reported cases and usually had a beneficial effect.

ISSN:0030-3755    

DOI:10.1159/000309030

出版商:S. Karger AG    

年代:1980

数据来源: Karger

摘要:

Large-surface transscleral freezing has been performed in severe proliferative diabetic retinopathy and recurrent vitreous haemorrhages. Out of 21 eyes visual acuity improved in 8, remained unchanged or diminished further in 13. Rapid clearing of the vitreous has been observed in one third of the patients.

ISSN:0030-3755    

DOI:10.1159/000309031

出版商:S. Karger AG    

年代:1980

数据来源: Karger

摘要:

About 96% of retinal detachments with a macular hole were cured by surgery. The most effective surgical procedure was diathermy with a macular buckling method and scleral infolding at the temporal part of the equatorial region, the rate of success being 100%. Only diathermy or diathermy plus scleral infolding at the temporal part of the equatorial region could reattach all detached retinas. Since macular buckling procedures made visual acuity worse, techniques without macular buckling should be used in cases without macular atrophy or degeneration of myopia. Retinal hemorrhage during or after operation was the most frequent complication (50%) of surgery for retinal detachment with a macular hole and occurred more frequently when macular buckling procedures were used. Macular hemorrhage caused deterioration of postoperative visual acuity.

ISSN:0030-3755    

DOI:10.1159/000309032

出版商:S. Karger AG    

年代:1980

数据来源: Karger

摘要:

Radiogenic or non-radiogenic osteosarcomas were found in approximately 15% of the observed bilateral retinoblastoma cases, and only exceptionally in the unilateral cases. Such osteosarcomas are also seen in subjects without retinoblastoma, but belonging to affected families. Late second malignant extraocular tumours were only observed when we were dealing with a germinal mutation, that is in hereditary retinoblastoma. They are due to a pleiotropic effect of a single gene situated on the chromosome D13 (ql4), or to two different but very close genes.

ISSN:0030-3755    

DOI:10.1159/000309033

出版商:S. Karger AG    

年代:1980

数据来源: Karger

摘要:

The adaptive processes mentioned here (which include inhibitory phenomena and modifications in spatial localization) were observed, using a stereoprojector with polarized light. Comparing the adaptive processes in convergent and divergent strabismus has led to the following observations: (1) there are differences between the two types of strabismus; these differences appear not only at the level of the binocular sensory parameter but also at the level of motor and accommodative parameters; adaptive processes are less deep and less serious in divergent strabismus; these differences are also manifest in therapy: divergent strabismus is curable whatever the age, treatment is much shorter. These observations were the starting point for using prismatic overcorrection to induce a state of ‘sensory divergence’ as treatment in cases of convergent strabismus with anomalous retinal correspondence. The excellent results obtained using this method of treatment are not only due to the action on sensory binocular relations, but also to the fact that prismatic overcorrection also modifies abnormal motor patterns. Treating strabismus must involve the entire disturbed optico-sen-sorimotor complex.

ISSN:0030-3755    

DOI:10.1159/000309034

出版商:S. Karger AG    

年代:1980

数据来源: Karger

摘要:

The non-depolymerised mucopolysaccharides of the anterior chamber angle can become hydrated. This biological oedema can obstruct the trabeculae, but the physiological liberation of catabolic enzymes from the lysosomes depolymerises the mucopolysaccharides and prevents this obstruction. This is, on the contrary, facilitated by the corticosteroids, which reinforce the lysosomal membranes and impede the liberation of the catabolic enzymes. There are clones of goniocytes which are corticosensitive and others which are not. Depending upon the predominance of one or the other, the cortisone test will be positive or negative. The outflow facility of the aqueous humour is determined by the hydration state of the trabeculae. This state depends upon the polymerisation of the mucopolysaccharides of the trabecular skeleton.

ISSN:0030-3755    

DOI:10.1159/000309035

出版商:S. Karger AG    

年代:1980

数据来源: Karger

摘要:

The mechanical behavior of the iris-lens-zonule-ciliary body (ILZC) system under intraocular pressure variations, measured with Scan A, is studied on a series of 20 rabbit eyes. The experiments indicate that the ILZC system behaves like a partition between the anterior and vitreous chambers and not like a supporting structural member. The observed behavior is related to previous clinical observations and to the biostructural model of the eye described in a previous paper by the authors.

ISSN:0030-3755    

DOI:10.1159/000309036

出版商:S. Karger AG    

年代:1980

数据来源: Karger

ISSN:0030-3755    

DOI:10.1159/000309037

出版商:S. Karger AG    

年代:1980

数据来源: Karger

ISSN:0030-3755    

DOI:10.1159/000309038

出版商:S. Karger AG    

年代:1980

数据来源: Karger