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H Fledelius

Publications and source records attributed to H Fledelius.

17 recordsLinked to original sources
PubMed1979

Corneal astigmatism after cataract extraction. A comparison of corneal and corneoscleral incisions.

Corneal astigmatism after cataract surgery by way of corneal incision (C, n = 62) and corneo-scleral incision (CS, n = 61) was followed for six months. Corneal incisions were closed by continuous nylon 10--0 (7--25 loops, median 14). Corneo-scleral incisions were sutured with single knots (2--10, median value 5). Keratometric results in the C and CS groups are compared. Concerning the degree of astigmatism, pre-operative median values were 0.5 and 0.7 D, respectively. After one week they were 4.5 and 3.0 D; after two weeks 3.3 and 3.0 D; after four months 3.0 and 2.0 D; after six months (final status) 1.5 and 1.7 D, respectively. The differences between C and CS were not significant. For both, astigmatism after cataract surgery did not quite return to pre-operative levels. Concerning the axis (weaker meridian) of corneal astigmatism, the C cases retained their pre-operative distribution, while the CS cases showed the classical shift towards against-rule astigmatism. Final corrected visual acuity was of the same order in the C and CS group. Due to frequent shifts, also of the axis, it is recommended by early (preliminary) glass prescription not to correct the astigmatism, but to give only the best spherical correction.

Adult↗
PubMed1979

Variations of lens thickness in relation to biomicroscopic types of human senile cataract.

The results are reported of 38 ultrasonographic in vivo mensurations of intraindividual differences in axial thickness between a cataractous lens in one eye and a biomicroscopically clear or slightly cataractous lens (incipient deep cortical opacity) in the other. Obviously intumescent cataractous lenses were excluded. In general, the cataractous lens was thinner than the contralateral clear or slightly cataractous lens. Large decreases in lens thickness appeared in lenses with the capsule-near opacities of posterior subcapsular cataract (PSC) + anterior capsular/subcapsular opacity (ACSCO). PSC was more closely correlated to lens thinning than was ACSCO. Nuclear cataract very often occurred in thin lenses, but did not appear to cause lens thinning per se. Deep cortical opacity was not associated with lens thinning. The present results contributed to our argumentation that the decrease in lens thickness is due to a leak of lens material through the "lens membrane" beside a possible cessation of growth of the lens fibres.

Age Factors↗
PubMed1978

[Eye diseases].

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Eye Diseases↗
PubMed1978

Optic disc cupping and prematurity. Large cups as a possible low birth weight sequel.

In a previous ophthalmic study of ex-prematures around the age of 10 years it was accidentally found that cupping of the optic disc was significantly more pronounced in children of a low birth weight (less than 2000 g) than in full-term controls (Fledelius 1976). This was true for cup size (cup/disc diameter ratio) as well as depth (as indicated by a visible cribriform plate). The present analyses make up an extension of the above study, with additional calculations based on some of its data. Within the ex-prematures (n = 268) the cup size did not seem to be related to birth weight, sex, or visual acuity. Eyes with myopia of prematurity were not especially 'loaded' with large cups. For the whole sample (including the 187 full-term control there was a weak association between cup size and refraction (and axial eye length). Larger cups occurred relatively more often in myopic eyes. Possible mechanisms behind early changes in disc are discussed (astroglial hypothesis--distension of disc--loss of retinal nerve fibers). It is felt that this new observation--large disc cupping as a possible low birth weight sequel--has to be substantiated by further clinical evidence, as statistical type 1 error (mass significance) cannot be ruled out.

Child↗
PubMed1978

Uveitis in rabbits with pleural effusion disease. Clinical and histopathological observations.

Pleural effusion disease (PED) is a generalized infection of laboratory rabbits caused by a virus-like agent. The disease was first described in the late sixties as a mortality problem among rabbits used for the propagation of Nichols' pathogenic Treponema pallidum in Scandinavian laboratories using the T. pallidum immobilization (TPI) test for the serological diagnosis of syphilis. The iridocyclitis, described as a manifestation of PED, has been studied in detail in rabbits experimentally infected with the PED agent. All rabbits surviving the acute phase of infection developed a non-pyogenic, non-granulomatous anterior uveitis during the "viraemic" stage of infection. The ocular signs of disease culminated between days 3 and 6 and disappeared within 2 to 3 weeks. No recurrence of uveitis was observed during a 6-months observation period, nor by subsequent subcutaneous re-inoculation of the PED agent. Histologically, the uveal reaction was mild and regressed almost completely within 4 weeks. Discrete choroidal inflammatory foci occurred in some of the re-inoculated rabbits, but without changes in the anterior eye segment. The uveitis of pleural effusion disease in rabbits seems to be caused directly by the virus-like agent. It might possibly serve as a simple and reproducible model in further uveitis research.

Animals↗
PubMed1977

Computed tomography of orbital lesions. A radiological study of 144 cases.

During the first two years with the 160 x 160 matrix EMI scanner 144 consecutive patients referred with suspicion of orbital disease were subjected to 190 computed tomography (CT) examinations. The X-ray attenuation and enhancement patterns of the various lesions were analyzed. In general it was difficult to correlate these parameters with the histopathological features. Hemangiomas, however, showed little enhancement and meningiomas a large degree of enhancement, while malignancies, lymphomas and pseudotumors were mainly intermediate. With orbital Graves' disease a low preinjection attenuation and a large enhancement (with normal striated neck muscle as a reference) was found in the external eye muscles. The diagnostic accuracy of CT (n=143) was compared to that of A/scan ultrasonography (US, n=80) and carotid angiography (n=40). CT showed the highest accuracy of the three methods, but CT differed only statistically from carotid angiography.

Adolescent↗
PubMed1977

Optic nerve glioma and phaeochromocytoma associated with von Recklinghausen's disease: A case report.

A 32-year-old woman who died suddenly during pregnancy as a result of an adrenal phaeochromocytoma also suffered from von Recklinghausen's disease. 21 years earlier she had an optic nerve glioma successfully removed. The association between von Reckinghausen's disease and optic nerve glioma/phaeochromocytoma is well established. So far as is known, the present case is the first ever published with the triad: von Recklinghausen's disease, optic nerve glioma, and phaeochromocytoma.

Adrenal Gland Neoplasms↗
PubMed1976

Embryonal sarcoma of the orbit. A clinical review of 19 Danish cases.

The present study deals with 19 Danish cases of embryonal sarcoma of the orbit. Eight patients are still alive, however, only six with long-period survival (8-21 years). The contralateral orbit (and eye) remained uninvolved in the 19 cases; accordingly the six long-period survivors all have normal "social" vision. In 17 cases the homolateral eye was removed early or late in the clinical history. Only one of the long-period survivors has preserved the homolateral eye (and with useful vision, 6/24 after surgery for irradiation cataract). The nation-wide investigation covers a period of 22 years. It reflects the difficulties in diagnosing orbital tumours and the changes in therapeutic approach to date. Megavoltage radiotherapy plus chemotherapy immediately after the initial biopsy is now considered the therapy of choice; exenteration of the orbit is performed only in the case of a recurrence. Against the background of the present and an earlier study, centralization of Danish orbital malignancies in infants and children is advocated.

Adolescent↗
PubMed1975

Orbital tumours in infancy. An analysis of Danish cases from 1943-1962.

A Danish nation-wide 20-year series of orbital tumours in infancy is reported, making up a total of 80 histopathologically verified cases. Secondary tumours were not included except for a few cases where the initial manifestation of the disease was an orbital mass, suggesting a primary tumour of the orbit. A scant half of the series were benign choristomas. Otherwise there was a considerable share of more serious diseases, often threatening vision and/or life; thus ten embryonal sarcomas and nine optic nerve gliomas were found. The malignancies made up a total of 17 cases. Because of the many medical specialities necessary for prompt diagnosis and efficient therapy, a centralization of the more serious orbital cases is feld mandatory. Considering the rather low overall frequency of orbital tumours, a centralization will not constitute a load numerically; an estimate for Denmark (population 5 million) is about five infantile cases a year.

Child↗
PubMed1975

Malignant melanoma of the choroid in an 11-month-old infant.

A malignant melanoma of the choroid was observed in an 11-month-old fair-skinned Danish boy - one of the youngest cases ever published. There was no evidence of pre-existing melanosis of eyes or skin. The tumour showed histopathologically a typical "adult" pattern and was classified as a mixed tumour. The melanin content was marked. In some earlier reports on uveal tumours within the first year of life, pigmentation was sparse or lacking; a hypothesis has therefore previously been advanced: That melanomas are unable to produce melanin so early in life. The present case renders proof against this hypothesis.

Age Factors↗
PubMed1975

Cataracta ossea and other intraocular ossifications. A case report and a thirty-year Danish material.

Cataracta ossea is described in a 5-year-old Danish boy, representing a sequal to a unilateral measles-endophthalmitis 3 years earlier. Ossification was not demonstrated elsewhere in the eye. Further, cases of intraocular ossification over a 30-year period were reviewed, based on the files of the Eye Pathology Institute. The total of 155 made up about 3% of enucleated eyes from Danish material received for examination. Regarding age at the initial eye lesion, more than half appeared within the first decade of life. The most frequent underlying lesions were trauma (32%) and uveitis (25%). Among the less frequent causes, emphasis is given to three cases of malignant uveal melanoma. Ossification of the lens was not encountered in the series - except for the case which motivated the review.

Cataract↗
PubMed1975

Comparative ultrasound oculometry. TAU-measurements of thirty eyes with three standard equipments.

Ultrasound oculometry (A mode) was performed in 30 eyes with three different standard equipments and great effort was made to make the three sets of measurements comparable. In spite of careful calibration procedures significant inter-equipment differences were found: anterior chamber depths and lens thicknesses showed the greatest discrepancies. These findings should be kept in mind when oculometric results of different authors are compared. A standardized eye-like phantom is desirable as a common reference for all who work in ultrasonic oculometry.

Adolescent↗