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P Secheyron

Publications and source records attributed to P Secheyron.

At least 19 recordsLinked to original sources
PubMed1979

[Renewed peripheral sub-retinal vascularization and its pathological consequences (author's transl)].

The existence of renewed peripheral sub-retinal vascularization has been known for some time, but it has not attracted the attention that it merits. It possesses similar features to that of renewed sub-retinal vascularization of the posterior pole, and the consequences of this condition are well known. Two clinical cases are reported in which clinical and angiographic investigations demonstrated this type of alteration. Histological examinations showed its continuity with the choriocapillary. It is possible, though still not conclusively demonstrated, that renewed peripheral sub-retinal vascularization plays an important role in peripheral retinal diseases such as serohemorrhagic detachments of the peripheral retinal degenerations.

Adult↗
PubMed1977

[Basal uveo-retinitis (peripheral uveitis, chronic posterior cyclitis, pars planitis, vitritis, hyalo-retinitis). and other inflammations of the peripheral retina].

The study of the histological features of the peripheral retina and the observation of this periphery in 149 cases of uveitis of various types has led us to consider these peripheral retinal inflammations as presenting clinically either as a local reaction in this area during the course of anterior and posterior uveitis, manifested by a circular inflammatory condensation of the peripheral vitreous, or as a specific affection related to the periphery. These latter assume two forms: either that of a peripheral chorio-retinitis, or that of a basal uveo-retinitis, a term proposed in place of those considered inadequate--pars planitis, peripheral uveitis, chronic posterior cyclitis. In accordance with this conception four forms of uveitis can be distinguished: anterior uveitis, posterior uveitis, peripheral chorio-retinitis and basal uveoretinitis.

Adolescent↗
PubMed1977

[Vogt-Koyanagi-Harada disease. About two observations (author's transl)].

After a reminder of clinical symptoms and development of the V.-K.-H. disease, some histological and clinical observations are related. The clinical observations are very characteristic of the V.-K.-H. disease. There are only two notable points: in both observations, a very low lymphocytic reaction to phytohemaglutinin and in the first observation, the presence of an anemia with parallel evolution to the uveitis. The histological examination of the depigmented area shows an infiltrate as described by Perrot, around the involved area in vitiligo. Ultrastructural study identifies 250 angströms wide particles that appear to be particles of alpha-glycogene, well developed amyelinic endings, and lastly, lymphocytoid cells closely joined with dendritic cells having internal granulations. These aspects have already been found in the iris by the Japanese authors, and they evoked an immunological mechanism.

Adult↗
PubMedDate not supplied

Angle-fixated anterior chamber phakic intraocular lens for myopia of -7 to -19 diopters.

PURPOSE: To assess the safety and efficacy of a second generation, anterior chamber phakic intraocular lens (Baikoff Model ZB5M) in patients with high myopia. METHODS: One hundred and twenty-one patients (134 eyes) with myopia of -7.00 to -18.80 D were implanted with the ZB5M lens and followed for 18 to 52 months; the number of eyes evaluated was: 6 months (104 eyes), 1 year (91 eyes), 18 months (78 eyes), 2 years (68 eyes), and 3 years (35 eyes). RESULTS: Postoperative spherical equivalent refraction averaged -1.00 D and the error in refractive correction (achieved minus intended) averaged -0.40 D during the first 2 years, increasing -to -1.30 D refraction and -0.60 D error in refractive correction at 3 years. At 2 years, approximately 40% of eyes had a spherical equivalent refraction within +/-0.50 D, and 65% within +/-1.00 D. The uncorrected distance visual acuity was 0.048 at baseline and 0.5 at 3 years; near visual acuity was 0.21 at baseline and approximately 0.7 over the 3 years of follow-up. Spectacle-corrected distance visual acuity at baseline was 0.54; it improved to 0.7. Near visual acuity was 0.65 at baseline and it improved to approximately 0.75. Endothelial cell counts in the central and peripheral cornea were reduced by an average 3.3% at 6 months, declining an additional 1% to 2% over the remaining follow-up period. Regression analyses indicated that most of the endothelial cell loss was due to surgery. Additional complications included halos/glare in 37 of 133 eyes (27.8%) and iris retraction with pupillary ovalization in 30 of 133 eyes (22.6%). The intraocular lens was exchanged in four of 133 eyes (3.0%) and removed in three of 133 eyes (2.3%), the latter because of halos (one eye) and a flat anterior chamber with severe inflammation (two eyes). CONCLUSIONS: Implantation of the Baikoff ZB5M lens in the anterior chamber of phakic eyes significantly reduced high myopia and produced a stable refractive outcome over the 3 years, accompanied by marked improvement in uncorrected distance visual acuity and minimal, non-progressive damage to the corneal endothelium. Frequent complications included pupillary ovalization and halos/glare. Improvements in accuracy of IOL power calculations are needed.

Adult↗