Anna Midelfart

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We studied characteristics and modulation of ion channels in primary cultures of opercular epithelium from the euryhaline marine killifish Fundulus heteroclitus. Primary cultures, 17-28 h old, retain mitochondria-rich Cl- cells identifiable by fluorescence microscopy. Cell-attached patches revealed frequent low-conductance 8.1 +/- 0.35 pS channels that(More)
PURPOSE To determine the prevalence of refractive errors in the young and middle-aged adult population in Norway. METHODS Refractive errors were measured in a population-based sample of young (20-25 years) and middle-aged (40-45 years) adults participating in the Helseundersøkelse i Nord Trøndelag (HUNT) Health Study, conducted in the County of(More)
In this study the prevalence of myopia and age at onset among medical students were determined. Of the 140 senior medical students at The Faculty of Medicine, University of Trondheim, Norway, 133 (75 females, 58 males) were examined. Visual acuity was tested and the refractive error was measured using automated refraction and clinical refractive technique.(More)
In this minireview, the factors involved in the development of corneal injury due to an increased amount of UVB rays are summarized. Experimental studies have shown that an increased number of UVB rays leads to a profound decrease in corneal antioxidants (high molecular weight, antioxidant enzymes as well as low molecular weight, mainly ascorbic acid) so(More)
PURPOSE To describe the occurrence and heritability of astigmatism in a population-based sample of Norwegian twins. METHODS Self-reported history of astigmatism based on questionnaire responses was used to estimate the prevalence and incidence rates of astigmatism from birth through 31 years in 8,045 twins. Kaplan-Meier analysis and log-binomial(More)
PURPOSE The aim of this study was to investigate the effect of near-work on development and progression of myopia among adults exposed to high educational demands. METHODS A three-year longitudinal refraction study was performed among 224 Norwegian engineering students (mean age 20.6 years, 117 females and 107 males) measuring their refraction at the(More)
PURPOSE This study was conducted to investigate metabolic changes in aqueous humor from rabbit eyes exposed to either UV-A or -B radiation, by using (1)H nuclear magnetic resonance (NMR) spectroscopy and unsupervised pattern recognition METHODS methods. Both eyes of adult albino rabbits were irradiated with UV-A (366 nm, 0.589 J/cm(2)) or UV-B (312 nm,(More)
A clinical evaluation of a new electron ProTon tonometer was performed comparing the values of intraocular pressure (IOP) measured using this instrument with those determined by a similar instrument, Tono-Pen XL, and by Goldmann applanation tonometry. The mean IOP measured in 106 eyes with the ProTon tonometer was not significantly different from that(More)
PURPOSE This study was initiated to compare the refractive state in a population sample to that among university students in Norway and to that among the general population in other Nordic countries. METHODS A population sample of 112 individuals and 224 engineering students were randomly selected and examined using automated and clinical refraction in(More)
BACKGROUND The aim of this study was to determine the prevalence of refractive errors among young and middle-aged adults in Norway. MATERIAL AND METHODS Refractive errors were measured with an autorefractor in a population-based sample of young (20-25 years) and middle-aged (40-45 years) adults participating in a health study (HUNT) conducted in(More)