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Biomedical subjects

P Syrdalen

Publications and source records attributed to P Syrdalen.

9 recordsLinked to original sources
PubMed1991

[Laser in ophthalmology].

The article presents a brief history of the use of laser in ophthalmology in Norway, from the introduction of the first Argon-photocoagulator in 1972 to the Excimer-laser in 1990. The Argon-photocoagulator is in daily use in all Eye Departments in Norway and the main group of patients treated are those with diabetic retinopathy. Glaucoma has been treated with Argon-laser with good results for the last ten years. YAG-laser, introduced in Norway in 1985, is used to treat secondary cataracts which occur after extracapsular cataract extractions and implantation of artificial lenses. In 1990, the Excimer-laser was introduced for refractive surgery (myopia, astigmatism).

Cataract Extraction↗
PubMed1991

[Retinal detachment after cataract surgery with intraocular lens implantation].

92 pseudophakic retinal detachments were treated in our hospital over a period of six years. These cases are reviewed retrospectively, with special emphasis on the factors that influenced the surgical outcome. The overall rate of success was 80%. Visual acuity was better than 0.1 in 77% of the cases. The major cause of failure was proliferative vitreoretinopathy, which was responsible for seven of ten failures. Postoperative proliferative vitreoretinopathy was the only factor that gave a significantly poorer prognosis after surgical treatment, although the presence of high myopia and preoperative proliferative vitreoretinopathy tended to give a less successful outcome. Likewise, there was a tendency for better prognosis in eyes with posterior chamber intraocular lenses.

Adult↗
PubMed1991

Retinal detachment after YAG-laser capsulotomy.

Preoperative findings and postoperative results in 8 patients with retinal detachment after YAG-laser capsulotomy are described. In this period the over-all incidence of clinical retinal detachment in pseudophakic eyes after YAG capsulotomy in our hospital was 1.0% (2 of 193). Possible relationships between YAG-laser capsulotomy and retinal detachment are discussed. Two risk factors for developing retinal detachment were found in 6 of 8 patients. After surgical repair 7 retinas were re-attached. The final visual acuity was better than 0.5 in 5 patients.

Aged↗
PubMed1991

Ophthalmomyiasis caused by the reindeer warble fly larva.

Two boys with ophthalmomyiasis caused by the first instar larva of the reindeer warble fly Hypoderma tarandi are reported. Both were 9 years old and came from the coast of northern Norway. One had ophthalmomyiasis interna posterior and one eye had been removed because of progressive pain and blindness. Histological examination showed the remains of a fly larva. The second boy had ophthalmomyiasis externa with a tumour in the upper eyelid, and histological examination showed a warble with a well preserved larva. Identification of the parasite in the histological material was based on the finding of cuticular spines and parts of the cephalopharyngeal skeleton identical with those of the first instar larva of H tarandi.

Animals↗
PubMed1990

Intraocular metastasis from cutaneous malignant melanoma.

Metastatic melanoma to the eye can show a number of unusual features. Two cases with intraocular metastases from primary cutaneous malignant melanoma, with a latency of 5 and 16 years, respectively, from excision to debut of ocular symptoms are reported. In the first case, tumour cell invasion of the chamber angle caused an advanced secondary glaucoma. This eye was enucleated some months later when the tumour extended through the sclera despite palliative external radiation therapy. In the other seeing eye, small melanoma metastases were treated with laser. The patient died of systemic involvement. In the second case, a probable melanoma metastasis was revealed by a vitrectomy of a thickened posterior vitreous membrane. Ophthalmoscopy and B-scan ultrasonography 8 months later showed growths projecting 2 mm into the vitreous cavity. Metastases from a malignant melanoma with infiltration of the retina forming nodules, but also affecting adjacent choroid and optic nerve, was disclosed by histology. The patient died of metastasis to the brain.

Anterior Chamber↗
PubMed1979

One hundred consecutive cases of pars plana vitrectomy with the vitreous stripper.

The results of 100 consecutive cases of pars plana vitrectomy are reported. Vitrectomy was performed on accunt of complications of diabetic retinopathy (37 eyes), complicated retinal detachment (28 eyes), vitreous haemorrhage of various causes (17 eyes), vitreous haemorrhage and complications secondary to injuries (13 eyes) and secondary cataract or vitreous in the anterior chamber creating corneal dystrophy (5 eyes). With an average follow-up time of 14.2 months, vitrectomy resulted in visual improvement in 55 eyes, unchanged visual acuity in 24 eyes and reduced visual acuity in 21 eyes. The operative and postoperative complications were: secondary vitreous haemorrhage (11 eyes), retinal detachment (8 eyes), haemorrhagic glaucoma (7 eyes), retinal tears (5 eyes), lens injury (4 eyes), corneal dystrophy (2 eyes) and endophthalmitis (1 eye).

Adolescent↗
PubMed1979

Ultrasonographic study on changes in axial eye dimensions after encircling procedure in retinal detachment surgery.

The pre- and postoperative results of ultrasonographic measurements on the axial ocular components in 10 phakic eyes with retinal detachment treated with encircling silicone rubber band are presented. A significant increase (P less than 0.001) in axial eye length from 0.62 to 1.24 mm (average: 0.98 mm) was found. The elongation of the eye was caused by a corresponding increase in the length of the vitreous cavity. No significant changes were found in the anterior segment of the eyes. These data demonstrate that the postoperative refractive change in a myopic direction, which an encircling procedure with moderate indentation often produces, is caused by an axial elongation of the eye.

Adolescent↗
PubMed1977

Haemorrhagic maculopathy in young adults.

The results from a retrospective clinical study of a group of patients with a specific macular disease are presented. The group includes young adults, otherwise healthy, with no hereditary diseases. The macular disease is as a rule monolateral. The lesion consits of a small central nodule surrounded by subretinal haemorrhages, retinal oedema and degenerative changes in the adjacent pigment epithelium. Fluorescein angiography demonstrates subretinal neovascularization in the central part of the lesion. The disease is selflimiting and the lesion develops into a fibrotic scar. In some cases, small, atrophic spots are seen scattered in the eyeground. There is no vitreous reaction and no signs of anterior uveitis. The clinical picture is identical with the macular lesion reported in the presumed ocular histoplasmosis syndrome.

Adolescent↗