Sökning: "Myopia"

Visar resultat 11 - 15 av 26 avhandlingar innehållade ordet Myopia.

  1. 11. Methods for detection and prevention of monocular and binocular visual impairment in childhood

    Författare :Joan Lithander; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :visual acuity; infant visual development; school screening; amblyopia; myopia; eye injury; prevention of blindness; developing country; Sultanate of Oman;

    Sammanfattning : The main causes for monocular visual loss in childhood are amblyopia and injury, and in the case of poor vision in both eyes refractive errors, the principle cause being myopia. Reliable visual acuity testing, reaching children at as young an age as possible, is essential in detecting these conditions and monitoring their treatment. LÄS MER

  3. 12. Peripheral Vision : Adaptive Optics and Psychophysics

    Författare :Robert Rosén; Peter Unsbo; Larry Thibos; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis is about our peripheral vision. Peripheral vision is poor compared to central vision, due to both neural and optical factors. The optical factors include astigmatism, defocus and higher order aberrations consisting mainly of coma. Neurally, the density of ganglion cells decreases towards the periphery, which limits the sampling density. LÄS MER

  4. 13. Peripheral Optics of the Human Eye:Applied Wavefront Analysis

    Författare :Dmitry Romashchenko; Linda Lundström; Peter Unsbo; Geunyoung Yoon; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optik och fotonik; Optics and Photonics;

    Sammanfattning : I denna avhandling används vågfrontsanalys för att studera ögats perifera optik med betoning på dess betydelse för utvecklingen av närsynthet (myopi). Syftet är att hitta egenskaper i den perifera bildkvalitén som skulle kunna användas av ögat för att reglera dess tillväxt. LÄS MER

  5. 14. Refractive surgery with the ArF excimer laser (photorefractive keratectomy) : surgical technique, wound healing and refractive results

    Författare :Heléne Hamberg-Nyström; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Photorefractive keratectomy; excimer laser; comparison; centration; contrast sensitivity; night vision; endothelial cell; epithelial thickness; multipassmultizone; multizone; haze; saccades; hyaluronan; myopic regression; reoperation; wound healing.;

    Sammanfattning : Excimer lasers have been adapted to treat refractive errors in the human eye since 1987. By remodeling the corneal surface, myopia and astigmatism can be corrected. The investigations herein were performed during a time period when the surgical technique development was extensive. LÄS MER

  7. 15. Ophthalmological aspects of prematurity

    Författare :Gerd Holmström; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Prematmity - retinopathy of prematmity - incidence - cryotherapy refractive enors - visual impairment - strabismus - cerebral lesions - matemalrisk factorsneonatallisk factors;

    Sammanfattning : In a prospective, population-based study of a weIl defined geographical area in Sweden, an ROP incidence of 40.4% was found among 260 prematurely born infants with a birth weight of 1500 grams or less. Cryotherapy was performed in 10.8% of the infants. LÄS MER