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Biomedical subjects

G Stigmar

Publications and source records attributed to G Stigmar.

16 recordsLinked to original sources
PubMed1993

Retinopathy of prematurity in the southern part of Sweden.

The incidence of retinopathy of prematurity (ROP) was studied in prematures in the southern part of Sweden during one year. Nine hospitals participated in the prospective study. During the period 23,745 children were born in the region. One hundred and ninety-three of 214 prematures of gestational age < or = 32 weeks and/or birth weight < or = 1500 g, were subjected to ophthalmic investigation. The incidence of ROP among the prematures under study was calculated to 9% (17 children). Six of them had severe ROP (3%). Some risk factors associated to ROP are discussed.

Female↗
PubMed1981

Testing for hypermetropia in the school vision screening programme.

The need and accuracy of a hypermetropia test, recommended as a screening test in Swedish schools, was evaluated in a series of 118 8-year-old children not wearing glasses. The distant visual acuity was determined without correction and with plus spheres of two different strengths, +1.5 D and +2.0 D respectively. When compared to the objective refraction and with an arbitrary limit of hypermetropia of +2.5 diopters, it could be shown that neither of the hypermetropia tests fulfilled the criteria of an adequate screening test. Except for two children all hypermetropics beyond +3.0 were previously known. The reading skills of the children were estimated by their teachers. No correlation was found between the degree of hypermetropia and reading difficulties. The results indicate that the hypermetropia test could be omitted from the regular vision tests of schoolchildren, at least in areas covered with an efficient pre-school vision screening.

Child↗
PubMed1978

Ophthalmic sequelae of infantile hemangiomas of the eyelids and orbit.

The major findings in a study of 51 infants and children with infantile hemangioma of the eyelid were as follows: Visual complications occurred in 27 patients. The most common complications were amblyopia (in 22) and strabismus (in 17). Amblyopia of 6/60 (20/200) or less was probably caused by stimulus-deprivation, but amblyopia in the range of 6/30 (20/100) to 6/12 (20/40) was likely caused by anisometropia or strabismus. Eyelid occlusion of six months or more invariably resulted in amblyopia of 6/60 (20/200) or less. Occlusion for even one month carried a risk of amblyopia. Each child must be considered individually for therapy, which must be started as early as possible. Patients should receive careful follow-up from the beginning to prevent severe amblyopia. For difficult cases, we need more efficacious, safe methods to induce regression of these tumors.

Adolescent↗
PubMed1978

Visual disorders in 7-year-old children with and without previous vision screening.

An analysis of visual defects among 310 children referred from a vision screening of 2 178 7-year-old children revealed a 50% frequency of significant eye defects among the referrals (7% of screened children). Of the screened children, one group (1 530 children) had previous visual screening three years earlier. The other group (648 children) had no previous vision screening until the age of seven. A comparison between the two groups showed that the risk of finding a new significant eye disorder in a school entrant was more than 6 times greater for a child who was not examined in his preschool years, and the risk of finding an amblyopic child was more than 10 times greater. The results do indicate the need for continuation of the present vision screening program of pre-school children.

Astigmatism↗
PubMed1978

Plasma vitamin A transport and visual dark adaptation in diseases of the intestine and liver.

Quantitative analyses of plasma concentrations of retinol binding protein (RBP), prealbumin and total proteins were performed in normal subjects and in forty-two patients suffering from diseases of the intestine and liver. The visual dark adaptation ability (DAA) was also assessed. Reduction of DAA and of RBP and prealbumin levels was noted in patients with chronic liver disease and fat malabsorption. In sixty-eight patients with intestinal diseases the RBP concentration seemed to be reduced in relation to the degree and duration of steatorrhoea. Furthermore, inflammatory activity, as revealed by laborabory tests, markedly reduced the RBP level. Treatment with vitamin A increased the RBP and prealbumin concentrations and restored the DAA to normal in patients with malabsorption but normal liver function. In patients with liver disease reduced DAA and serum RBP values were not affected by vitamin A therapy. Only at RBP concentrations below half the normal was impairment of the dark adaptation observed, suggesting that serum RBP is a more sensitive indicator of vitamin A deficiency than measurement of dark adaptation.

Adolescent↗