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Biomedical subjects

M Ullern

Publications and source records attributed to M Ullern.

At least 37 records · Page 2Linked to original sources
PubMed1994

[Corneal pseudo-dystrophic complication caused by contact lenses].

The authors report the cases of two patients suffering of a rare long-term complication of contact lens wearing. Both patients wore daily soft contact lens for 5 and 8 years respectively. They presented with bilateral central predescemetic avascular haze associated with mild corneal stromal edema, descemetic folds in one patient and polymegethism on endothelial specular microscopic examination. The vision impairment was severe, unilateral in one patient and bilateral in the other. More than one year after removal of the contact lenses, only one patient fully recovered her initial visual acuity. The mechanisms of the onset of this corneal pseudo-dystrophy are discussed. Hypoxia and acidosis of the cornea induced by the contact lens are most probably responsible for this complication through endothelial metabolic dysfunction.

Adult↗
PubMed1993

[Value of corticoids in the treatment of postoperative endophthalmitis].

Postoperative endophthalmitis, which has a dreadful reputation, needs early and aggressive treatment. Apart local and systemic antibiotic therapy, the place of corticosteroid treatment is still discussed. The authors retrospectively compared three groups of patients treated with appropriate antibiotics but with different corticosteroid. Group I received high dose corticosteroids early regimen, group II received delayed corticosteroids treatment and group III did not receive corticosteroids. Visual recovery as well as vitreous transparency better in group I.

Acute Disease↗
PubMed1993

[Cataract and implantation in the vitrectomized eyes].

Cataract is a frequent complication of vitreous surgery after some months or years. In these cases cataract extraction is somewhat difficult. We performed cataract surgery with implantation in 38 eyes from 37 patients between 1986 and 1991. Twenty patients underwent vitreous or vitreoretinal surgery with or without internal tamponade by gas, 17 underwent silicone oil tamponade and silicone oil removal, prior to cataract surgery. Timing of surgery, number of surgical procedures and complications previous to cataract surgery are detailed in the paper. Cataract extraction was extracapsular in 7 cases, intracapsular in 6 cases; phako was performed in 24 cases and phacophagy in one case. A posterior IOL was inserted in 31 cases, an anterior chamber IOL in 7 cases. Anatomical and visual results were satisfying. Visual acuity improved postoperatively in 29 cases (up to 20/20 in 4 cases), was unchanged in 6 cases, decreased in 3 cases. Among these, loss of vision occurred in 5 cases due to retinal detachment or redetachment. For anatomical reasons, lack of vitreous support and the frequent zonular weakness of these eyes, account for surgical difficulties. Thus, phakoemulsification appears the best way to manage cataract in vitrectomized eyes.

Adult↗
PubMed1993

[Phacoemulsification by the anterior approach combined with vitreoretinal surgery].

Phacoemulsification was combined with vitreoretinal surgery in 22 cases in which lens opacity prevented good visualisation of the fundus. The main indications were proliferative diabetic retinopathy and retinal detachment complicated by proliferative vitreoretinopathy. Phacoemulsification was achieved by a limbal approach. The technique was adapted to the hardness of the lens nucleus. The incision was temporarily or definitely closed. The visualisation system was set up and the endocular surgery performed. In 5 cases an implantation in the bag was realised at the end of surgery. This type of combined procedure offers both the benefits of extra capsular surgery: avoids neovascular glaucoma in diabetic patients, keeps silicone oil in good position, possible implantation in the capsular bag, and those of a small incision: absence of leakage, of myosis, of corneal clouding, rapid rehabilitation.

Aged↗
PubMed1985

[Specular microscopy in the diagnosis of the iridocorneal endothelial syndrome].

Irido-corneal endothelial syndrome regroups three disorders including: endotheliopathy, peripheral anterior synechiae and iris changes. According to the aspect of these abnormalities, three syndromes are described: essential iris atrophy, Chandler's syndrome and iris naevus (Cogan-Reese) syndrome. Endothelial changes studied by specular microscopy are typical: in early stages, a rounding off cell angles and intracellular blackout areas can be seen; in former stages, black out areas increase and there is a disruption of the regular mosaic. These features are a major point for differential diagnosis. We present six cases reports among which three where effectively diagnosed as iridocorneal endothelial syndrome and three were not.

Adult↗
PubMed1982

[Pars plana vitrectomy: causal affections, material employed, and approach in 1400 cases (author's transl)].

Isolated vitrectomy was employed in half of 1,400 cases operated upon, the other patients receiving an intra-ocular injection of silicone fluid. Emphasis is placed on the simplification undergone by the materials employed, the progress represented by the addition of an autonomous infusion for each instrument complementary to the vitrectomy, and the need for all ophthalmic surgeons, particularly those in training, to become familiar with the use of the vitreotome.

Ciliary Body↗