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Biomedical subjects

D Aron-Rosa

Publications and source records attributed to D Aron-Rosa.

At least 37 records · Page 2Linked to original sources
PubMed1983

Reopening blocked trabeculectomy sites with the YAG laser.

After unsuccessful attempts to reduce the intraocular pressure of a 70-year-old man with advanced open-angle glaucoma by drugs, trabeculoplasty, and trabeculectomy, we used a mode-locked, pulsed picosecond neodymium YAG laser to cut away an opaque nonpigmented membrane that had occluded the trabeculectomy site. The intraocular pressure decreased immediately from 18 mm Hg to 5 mm Hg and a diffuse conjunctival bleb formed. One month later, the intraocular pressure was 11 mm Hg and the bleb was still present.

Aged↗
PubMed1983

Intraocular lens implantation in unilateral congenital cataract: a preliminary report.

We performed pars plana lensectomy with secondary anterior chamber intraocular lens (IOL) implantation in 32 cases of unilateral congenital cataract with otherwise normal appearing eyes. Five of the 12 patients old enough to respond achieved a visual acuity of 20/60 or better with evidence of fusion. We advocate operating within the first few months of life to lessen amblyopia.

Age Factors↗
PubMed1983

Methylcellulose instead of Healon in extracapsular surgery with intraocular lens implantation.

Methylcellulose 1% was used in the anterior chamber to facilitate posterior chamber lens implantation at the time of extracapsular cataract extraction. In parallel series with similar preoperative endothelial cell counts, 70 eyes implanted under methylcellulose had a mean central endothelial cell loss of 8 +/- 5.3% at 8 to 12 weeks postoperative, whereas 63 eyes implanted under an air bubble lost a mean 25.3 +/- 14.6% (P less than 0.001). No differences in postoperative visual acuity, intraocular pressure, or inflammation were noted. A YAG laser preoperative anterior capsulotomy was used in all cases, and may have contributed to overall preservation of endothelial cells.

Anterior Chamber↗
PubMed1981

[Ophthalmological use of pulsated Neodymium Yag lasers. Preoperative aperture of lenses previous setting in of artificial lenses and opening of secondary cataracts behind implants (author's transl)].

A new laser devised and built by the authors is presented. This cold laser is an ultra rapid pulsed Neodymium Yag laser. Its permits a very fine microsurgery without opening of the eye. The opening of the capsule and the softening of the nucleus are one example of the new laser surgery daily performed in Trousseau's Eye Clinic: all the ocular tissues, even uncolored and semi-transparent may be cut without heat with this laser. The mechanism of the action is clear. According to our studies, under such an irradiation, a local instantaneous energy deposit takes place, total ionization of the medium occurs, resulting in the formation of a plasma screen, then, after an hydrodynamic shock wave develops from the energy zone boundary. The elevation of the temperature at the site of the impact cannot exceed 2.10(-3) degree C, which is totally unharmful.

Aged↗
PubMed1981

Use of a pulsed neodymium Yag laser (picosecond) to open the posterior lens capsule in traumatic cataract: a preliminary report.

The use of an ultra short Nd Yag laser pulses is described for the opening of secondary traumatic cataract and iridocapsular synechiae. Both pigmented and non pigmented ocular tissue were cut without causing adverse thermal effects and without opening the eye. The laser instantaneous release of energy causes total ionization of the medium and formation of a plasma, followed by a hydrodynamic shock wave originating at the energy zone boundary. The temperature at the site of the laser contact cannot exceed 2 X 10(-3) degrees C, which is not harmful to the eye. Further, this procedure requires no anesthesia and does not involve introduction of foreign material into the eye. The degree of aiming accuracy, the very small diameter of the beam (50 microns) make the laser so precise that it virtually eliminates the risk of damage to the eye and/or the intraocular lens.

Adolescent↗
PubMed1980

Localized eosinophilic granuloma (Langerhans' cell histiocytosis) of the orbital frontal bone.

Four patients (aged 5, 8, 14, and 51 years at initial manifestation) with isolated eosinophilic granulomas of the orbital frontal bone displayed short symptomatic periods (two weeks to three months) and some combination of erythema of the lids, a soft, palpable anterior orbital mass, periorbital pain, and osteolytic bone lesions on roentgenography. The bone lesions roentgenographically exhibited irregular, serrated, and sclerotic margins, distinguishing them from the more oval appearance of dermoid cysts. Electron microscopy performed in one case disclosed the presence of Langerhans' granules in the cytoplasm of the histiocytes, indicating that the orbital disease is a mild form of "histiocytosis X" and a benign proliferation of a specific kind of histiocyte--the Langerhans' cell. On follow-up (two to 20 years), after incomplete curettage of two lesions coupled with low doses of postoperative radiotherapy, there was reconstitution of the bone defects, whereas more extensive surgery performed on the other two patients resulted in permanent but subclinical bone defects.

Adolescent↗
PubMed1980

Use of the neodymium-YAG laser to open the posterior capsule after lens implant surgery: a preliminary report.

The use of a neodymium-YAG laser is described for opening the opacified posterior capsule in a pseudophakic eye. Both pigmented and nonpigmented ocular tissues were cut without causing adverse thermal effects and without opening the eye. The laser's instantaneous release of energy causes total ionization of the medium and formation of a plasma, followed by a hydrodynamic shock wave originating at the energy zone boundary. The temperature at the site of laser contact cannot exceed 2 x 10(-3) degrees C, which is not harmful to the eye. Further, this procedure requires no anesthesia and does not involve introduction of foreign material into the eye. The degree of aiming accuracy, the very small diameter of the laser beam (50 microns) and the use of selector pulses make the laser so precise that it virtually eliminates the risk of damage to the eye or the intraocular lens.

Aged↗
PubMed1979

[Hypoplasia of the optic nerve head].

Optic nerve hypoplasia is not a rare eventuality in children. This report discusses the clinical features of 10 new cases on a multiple point of view including optic canal tomography, fluorescein angiography and cat's examination. Optic nerve hypoplasia is not always accompanied by decreased visual acuity: sector fields are often identified in these cases.

Adult↗
PubMed1978

Tolosa-Hunt syndrome.

Ten cases of painful ophthalmoplegia are reported. In all cases pain marked the onset of the disease; the condition was mostly unilateral. Recurrence and dramatic response to steroid therapy were more constant features than angiographic findings which may be completely normal. CAT permitted us to eliminate a tumor of the cavernous sinus in 7 cases, but in one case, which was operated, an aggravation followed surgery. Despite complete investigations of all patients, some questions remain unanswered. Is it an inflammatory or an allergic inflammatory process? (And the presence of antinuclear factor in an only case does not permit it to respond.) Why is the process confined to the superior orbital fissure? Mathew and Chandy tried to find a similarity between this syndrome and Bell's palsy although the 2 syndromes have not been shown to coexist. Is the Tolosa-Hunt syndrome comparable to the pseudotumor of the orbit? Although the dura mater is inserted on the border of the sphenoidal cleft, some patients may altern the 2 syndromes.

Adolescent↗
PubMed1977

[Two cases of chondrodysplasia punctuate are reported].

The first one was a 13 months old lewish boy with typical features of the rhizometic type; clinicaly the patient demonstrated cataract, esotropia, nystagmus, malnutrition, micromelia, contracture, multiple stippled calcifications about the periphery of the cartilagenous structures of the vertebral bodies, sternum, wrists, knees, heels, ribs; and profound mental retardation, After cataract operation, the head of the optic nerve demonstrate to be narrower than usualy and white. Pathologic studies of the lens' fragments after surgery showed the cataract to be without any specific characters. The child now 2 yrs and 1/2 old is still alive but in poor condition. The second was a 16 months old Arabic boy without typical features but with a cataract and stippled calfications of a limited number of epiphysae. Pathologic studies of the lens after cataract surgery showed the cataracts to be without any specific characters, the optic nerves were normal. The child now 3 yrs old is normally developed and in good conditions. It is remarquable to note that in both cases there was an history of consanguinity (mother and father were first cousins).

Abnormalities, Multiple↗