Sökning: "Visual Acuity"

Visar resultat 1 - 5 av 109 avhandlingar innehållade orden Visual Acuity.

1. 1. Bird Vision: Spatial acuity and colour discrimination in bright and dim light

   Författare :Olle Lind; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Animal vision; Visual ecology; Colour vision; Spatial acuity; Spatial contrast sensitivity; Dim light; Visual modelling; Behavioural experiments; Birds; Psittaciformes;

   Sammanfattning : Birds use vision to guide navigation, foraging and mate choice, and studies of the limitations in bird visual perception are most helpful for the understanding of bird ecology. Here, I present four studies of bird vision in bright and dim light. LÄS MER

3. 2. Amblyopia and subnormal visual acuity. Studies of prevalence, assessment and outcome

   Författare :Josefin Ohlsson; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Amblyopia; Visual Acuity; Eye Diseases; Epidemiology; Child; Adolescence; Depth Perception; Vision Screening; Treatment Outcome;

   Sammanfattning : Aims. The aims of this thesis were threefold. Firstly, we wanted to establish the distribution of visual acuity (VA) and the prevalence of amblyopia and other ocular disorders in two population-based samples of 12-13-year-old children, one that had been vision-screened at preschool age and the other that had not. LÄS MER

4. 3. Retinopathy and Visual Acuity in People with Diabetes Mellitus and Hard-to-Heal Diabetic Foot Ulceration

   Författare :Anders Sellman; Lund Oftalmologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Hyperbaric oxygen therapy; Diabetic retinopathy; Diabetic foot ulcers; Mortality; Visual acuity;

   Sammanfattning : .... LÄS MER

5. 4. Vision Beyond the Fovea: Evaluation and Stimuli Properties

   Författare :Abinaya Priya Venkataraman; Linda Lundström; Hema Radhakrishnan; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Peripheral vision; Visual optics; Optical correction; Orientation; Stimulus extent; Moving stimulus; Contrast sensitivity; Visual acuity; Central vision loss; Myopia; Biological Physics; Biologisk fysik;

   Sammanfattning : This research is about evaluating vision in the periphery. Peripheral vision is of fundamental importance in the performance of our everyday activities. The aim of this thesis is to develop methods suitable for the evaluation of peripheral vision and to assess how different visual functions vary across the visual field. LÄS MER

7. 5. Short- and Long-Term Follow-Up of Ophthalmological Findings in Preterm Infants and Children

   Författare :Eva Larsson; Gerd Holmström; Kristina Tornqvist; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Ophtalmology; prematurity; follow-up; retinopathy of prematurity; ROP; infants; children; incidence; screening; refraction; visual acuity; visual fields; Oftalmiatrik; Ophtalmology; Oftalmologi;

   Sammanfattning : In a prospective population-based study in Stockholm County, 1998-2000, the incidence of retinopathy of prematurity (ROP) was investigated and was found to be 36% in prematurely-born infants with a birth weight of ≤ 1500 grams. Compared to a study performed ten years ago, the overall incidence was unchanged, but was reduced in “mature” infants and increased in immature ones. LÄS MER