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Biomedical subjects

A Bronner

Publications and source records attributed to A Bronner.

At least 55 records · Page 3Linked to original sources

[Urrets-Zavalia syndrome and glaucomatous cataract. Etiopathogenic and nosologic discussion].

After penetrating keratoplasties for different congenital or acquired corneal diseases, the presence of characteristic cataracta glaucomatosa lens opacities was noted in 9 cases of fixed, dilated pupil iris atrophy of Urrets-Zavalia. This association--rarely mentioned in the literature--is an opportunity to study again the different physiopathological theories on this syndrome (pupillary block by mydriasis with hypertony, upsetting of iris neurovegetative balance, particular sensitivity of ocular tissues to the surgical aggression in keratoconus), to analyze their arguments, and the preventive measures that proceed from them. The almost complete extinction of this type of complication of the corneal graft surgery, since the routine use of these preventive measures, proves the multifactorial origin of this syndrome.

Adolescent↗

[Local fibrinolytic treatment in occlusions of the central retinal artery].

The effectiveness of thrombolytic agents used in local infusion has been demonstrated in the treatment of acute myocardial infarctions by several randomized trials. Thrombolytic therapy seems also to improve the prognosis of certain acute life-threatening brain stem strokes. Two cases of central retinal artery occlusion were treated with intracarotid urokinase injections. Visual acuity was improved in both cases in less than 24 hours, repermeation of the occluded vessels was observed 48 hours after the beginning of treatment. The limits of this kind of therapy are emphasized: there must be no contra-indication to the fibrinolytic agents, a delay shorter than 6 hours after the beginning of symptoms, a lack of arguments in favour of an embolism, and integrity of the carotid bifurcation. Surveillance in an intensive cares unit during the first days is required.

Adult↗

[The annular scotoma and jack-in-the-box phenomenon in aphakia corrected with eyeglasses. Experimental approach].

An experimental study of "annular scotoma" was conducted. Variations in prismatic effects at the boundary of the lens with respect to incidence were evaluated with the aid of a laser beam. The use of an arc-perimeter and an artificial aphakic eye allowed reconstruction of light beam paths from the outside to the inside of the eye. The results obtained enabled a more rigorous analysis of this optical phenomenon. A straightforward formula obtained from the experiment (tan theta = b/a) provided better understanding of the variations generated by certain parameters. This same formula can be applied to the mechanism of the "Jack-in-the-box" phenomenon.

Aphakia, Postcataract↗