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Biomedical subjects

A Vaiser

Publications and source records attributed to A Vaiser.

16 recordsLinked to original sources
PubMed1992

Bilateral inferotemporal dialysis in identical twins.

Retinal detachment associated with inferotemporal dialysis comprises approximately 10% of all retinal detachments. We describe the cases of two patients with bilateral inferotemporal dialyses who were identical twins. This finding suggests that genetic factors play a role in some cases of inferotemporal dialysis. One of the twins was asymptomatic, stressing the importance of examining other family members of patients with nontraumatic retinal dialysis. We believe that the cause of inferotemporal dialysis is multifactorial and there is a definite subpopulation in which a genetic predisposition is present.

Adult↗
PubMed1992

Limiting applications of cryotherapy for severe retinopathy of prematurity.

In an effort to minimize surgical and visual morbidity of cryotherapy for retinopathy of prematurity (ROP), 18 eyes of 13 patients with 3 to 7 clock hours of stage 3 ROP with "plus" disease were treated by cryotherapy applications limited to the avascular retina adjacent to the areas of stage 3 disease. In 17 of 18 eyes, this limited use of cryotherapy was sufficient to cause regression of ROP without further treatments. After at least 3 months follow-up, ROP outcome showed a normal macular appearance in 16 eyes; two eyes developed macular dragging; no retinal detachments occurred.

Cryosurgery↗
PubMed1990

Vitrectomy in eyes at risk for macular hole formation.

Fifteen eyes believed to be at increased risk for macular hole formation underwent vitrectomy in an attempt to prevent macular hole formation. Full-thickness macular holes have not developed in 10 of 11 eyes with stage 1 macular holes. Four eyes were noted to have small full-thickness foveal defects (stage 2 macular holes) at the time of vitrectomy. Two of the four eyes have not progressed to macular hole formation and have 20/25 visual acuity. All patients have been followed for a minimum of 13 months (median, 18 months). The 12 eyes that have not experienced macular hole formation have had a significant (P less than 0.001) improvement in vision with seven (58%) attaining visual acuity of 20/25 or better. The postoperative foveal electroretinogram (ERG) amplitude was higher than the preoperative amplitude in five of the six eyes tested.

Aged↗
PubMed1988

Temporary keratoprosthesis for combined penetrating keratoplasty, pars plana vitrectomy, and repair of retinal detachment.

The Landers-Foulks temporary keratoprosthesis was used to combine penetrating keratoplasty, pars plana vitrectomy, and scleral buckling in the management of 13 eyes with opaque cornea and posterior segment abnormalities. In seven cases, trauma precipitated the ocular disease. Complications of cataract surgery resulted in anterior and posterior segment pathology in six cases. The corneal graft was initially clear in all cases. However, corneal edema complicated phthisis bulbi in four cases and followed homograft reaction in two cases. Eight eyes with retinal detachment (RD) preoperatively were successfully reattached. In five eyes, the retina redetached as these eyes became phthisical. Visual function improved in six cases. In general, eyes with a history of trauma had a much poorer outcome than did eyes with anterior and posterior segment problems related to previous cataract surgery.

Adult↗
PubMed1979

Ultrasonographic features of choroidal malignant melanomas.

In a 12-month period 26 eyes were enucleated after an ultrasonographic diagnosis was made of malignant melanoma of the choroid. Histologic features of the tumors were reviewed. The ultrasonographic diagnosis was correct in 100% (26/26) of enucleated eyes. Spontaneous vascular movement (SVM) was identified by standardized A-scan echography in 69% (18/26) of the tumors. Contact B-scan ultrasonography demonstrated choroidal excavation in 65% (17/26) of the melanomas. During the 12-month study period, choroidal excavation was also demonstrated in cases of metastatic choroidal tumors, hemangiomas of the choroid, and long-standing choroidal nevi. The standardized A-scan finding of SVM is a compelling sign in the diagnosis of choroidal malignant melanoma. In contrast, the B-scan finding of choroidal excavation is a less useful sign since it may also be seen in various other ocular lesions.

Aged↗
PubMed1979

Retinal detachment and pseudophakia.

A consecutive series of pseudophakic retinal detachments was statistically compared with a matched group of aphakic retinal detachments. Distribution of breaks, anatomic results, and final visual acuities were tabulated. Success in reattachment was equal in the two groups, but final visual acuities were better in the aphakic group. Emphasis was placed on the intraoperative ophthalmoscopic examination of pseudophakic eyes with compromised peripheral fundus visibility.

Aphakia, Postcataract↗
PubMed1978

Focal parafoveal retinal telangiectasis.

We describe four patients, two of whom are sisters, with an unusual form of retinal telangiectasis. The vascular abnormality is localized to the temporal parafoveal retina and is virtually identical in appearance in every patient. Other characteristics include: both men and women are involved, both eyes are generally affected, and symptoms develop in middle life. Laser photocoagulation succeeds in improving the visual acuity in the treated eyes. The consistency of the appearance and location, and the familial tendency indicates these cases probably form a subgroup of retinal telangiectasis.

Adult↗
PubMed1978

Management of surgically dislocated intravitreal lens fragments by pars plana vitrectomy.

We examined 26 eyes (19 of them following phacoemulsification) with surgically dislocated intravitreal lens fragments; 24 eyes were subsequently operated on using pars plana vitrectomy for removal of lens fragments. From this select group of patients we found moderate to severe uveitis, glaucoma, and vitreous opacification present in virtually all cases. Less common complications were retinal detachments (six cases) and bullous keratopathy; the latter problem was found most commonly in eyes subjected to anterior segment maneuvers such as the use of lens loops or vitreous irrigation for removal of the lens material. Pars plana vitrectomy proved an excellent method for removal of lens fragments. A simultaneous two-instrument technique using the Wilson foreign-body forceps and the vitrectomy machine facilitated removal of the denser sclerotic lens fragments. This procedure resulted in resolution of the uveitis and glaucoma with improvement in visual acuity in 20 of the 24 eyes. However, only 10 of the 24 patients operated on obtained 20/40 or better visual acuity. A relatively prompt pars plana vitrectomy in eyes subjected to a minimum of surgical trauma yielded the best visual results.

Aged↗
PubMed1976

Pars plana vitrectomy for removal of intravitreous Cysticercus.

Pars plana was used for the removal of an intravitreous cysticercus, with minimal postoperative inflammation and an excellent visual result. This approach avoids lens removal and the visualization provided by the operating microscope allows removal of all vitreous humor particles and debris. The aspirated specimens allowed identification of the Taenia solium cysticercus.

Adult↗
PubMed1976

Vitrectomy in the treatment of ocular perforating injuries.

Using pars plana (closed) vitrectomy with related procedures we achieved improved vision in certain catagories of perforating ocular injuries. These procedures were particularly useful in removing retained nonmagnetic foreign bodies and correcting retinal detachments associated with traction bands and opaque vitreous. Limited success was obtained with longstanding injuries, double perforations from shotgun injuries, and large corneoscleral lacerations. Early vitreous surgery produced the best results.

Adolescent↗
PubMed1975

Retinal hemorrhage associated with thrombasthenia.

A healthy 20-year-old man presented with a spontaneous unilateral retinal hemorrhage. Because of a history of easy bruisability, we obtained hematologic studies and diagnosed thrombasthenia, a hereditary hemorrhagic disorder. The association of retinal hemorrhage and thrombasthenia is rare. Thrombasthenia and other platelet functional disorders are becoming better defined as tests for these abnormalities become more reliable and available. Patients with apparent spontaneous retinal hemorrhages of unknown origin should be questioned about hemorrhagic tendencies, and the various tests for hemorrhagic disorders should be obtained. The hematologic survey should include the more sophisticated tests of platelet function. Patients with thrombasthenia should avoid aspirin intake.

Adenosine Diphosphate↗
PubMed1975

Surgical removal of nonmagnetic foreign bodies.

A microsurgical technique for the removal of nonmagnetic foreign bodies in eyes with opaque media incorporated the simultaneous use of the foreign body forcepts with a vitrectomy machine equipped with fiberoptics. The superb viewing system provided by the operating microscope combined with the excellent illumination from intraocular fiberoptics offered precise surgical control. Nonencapsulated nonmagnetic foreign bodies in eyes with clear vitreous cavities were removed by using the operating microscope, corneal contact lens, and foreign body forceps introduced through a pars plana location. Vitrectomy was not performed. The surgical techniques allowed early removal of the foreign body and, in a preliminary series of cases, improved visual results in what is usually a devastating ocular injury.

Eye Foreign Bodies↗
PubMed1975

A coaxial electrode for intraocular diathermy.

A bipolar electrode was used in intraocular coagulation of vessels. This device was a useful adjunct for the coagulation of vessels in diabetic eyes undergoing vitrectomy. No surgical complications due to the diathermy occurred in the first six patients on whom the device was used.

Diabetic Retinopathy↗
PubMedDate not supplied

Laser iridectomy.

The argon laser and the ruby laser have been used to open the pigment layer in three cases of surgically incomplete peripheral iridectomy. The technique, its advantages and complications, were discussed. On two additional eyes, full-thickness argon laser iridectomy was unsuccessful.

Aged↗