Sökning: "Aberrations"

Visar resultat 1 - 5 av 333 avhandlingar innehållade ordet Aberrations.

1. 1. Wavefront Aberrations and Peripheral Vision

   Författare :Linda Lundström; Peter Unsbo; Austin Roorda; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optics; Human eye; Aberrations; Peripheral vision; Central visual field loss; Optics; Optik;

   Sammanfattning : Failing eyesight causes a dramatic change in life. The aim of this project is to help people with large central visual field loss to better utilize their remaining vision. Central visual field loss means that the person has to rely on peripheral vision since the direct vision is lost, often due to a dysfunctional macula. LÄS MER

3. 2. Mitotic aberrations in mammalian cells

   Författare :Anna Renglin Lindh; Thomas Helleday; Micheline Kirsch-Volders; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; aneuploidy; mitotic aberrations; chemical effects; human cancer; DNA repair; Genetics; Genetik;

   Sammanfattning : Almost all cancer cells are aneuploid showing the wrong chromosome number and often with structural aberrations. The degree of aneuploidy correlates with an increase of the severity of the disease and tumour cells with chromosomal instability are more prone to acquire resistance to chemotherapy than other cells. LÄS MER

4. 3. Manipulation of Ocular Aberrations in Myopes

   Författare :Baskar Theagarayan; Jörgen Gustafsson; Frank Schaeffel; Linnéuniversitetet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Myopia; Spherical aberration; Accommodation; Contact lens; Visual acuity; Peripheral aberrations; Optometry; Optometri; Optometry; Optometri;

   Sammanfattning : Myopia is a major cause of vision loss throughout the world. High myopia is associated with severe eye diseases like maculopathy, retinal detachment and glaucoma. The prevalence of myopia is increasing, and varies by country and by ethnic group. In some Asian populations the prevalence is 70%-80%. LÄS MER

5. 4. Decoding the Structural Layer of Transcriptional Regulation : Computational Analyses of Chromatin and Chromosomal Aberrations

   Författare :Robin Andersson; Jan Komorowski; Jan Dumanski; Claes Wadelius; Anders Krogh; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chromatin; Nucleosome positioning; Histone modifications; Chromosomal aberrations; Transcriptional regulation; Array-CGH; Next generation sequencing; ChIP-chip; Bioinformatics; Bioinformatik; Bioinformatics; Bioinformatik;

   Sammanfattning : Gene activity is regulated at two separate layers. Through structural and chemical properties of DNA – the primary layer of encoding – local signatures may enable, or disable, the binding of proteins or complexes of them with regulatory potential to the DNA. LÄS MER

7. 5. Optics for Low Vision Enabling

   Författare :Jörgen Gustafsson; Certec - Rehabiliteringsteknik och Design; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Eccentric viewing; Low vision optics; Low vision rehabilitation; People with low vision; Preferred retinal; locus PRL ; Resolution; Visual acuity; Ophtalmology; Medicinsk teknik; Medical technology; Rehabilitering medicinsk och social ; rehabilitation; revalidation; kinesitherapy; Oftalmologi; Physical medicine; Contrast sensitivity; Detection; Eccentric correction; CFL ; Central visual field loss; Central scotoma; Aberrations; Astigmatism;

   Sammanfattning : For people with central visual field loss, eccentric vision is all that they have to rely on. Even for those who learn how to correctly utilize their eccentric vision, it will never be as good as the central for two entirely different reasons: the off-axis optics of the eye can result in large refractive errors, and the low function of the peripheral retina. LÄS MER