Search for dissertations about: "Low vision optics"

Showing result 1 - 5 of 13 swedish dissertations containing the words Low vision optics.

2. 1. Optics for Low Vision Enabling

   Author : Jörgen Gustafsson; Certec - Rehabiliteringsteknik och Design; []
   Keywords : 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;

   Abstract : 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. READ MORE

4. 2. Peripheral Vision : Adaptive Optics and Psychophysics

   Author : Robert Rosén; Peter Unsbo; Larry Thibos; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : 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. READ MORE

5. 3. Wavefront Aberrations and Peripheral Vision

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

   Abstract : 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. READ MORE

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

   Author : Abinaya Priya Venkataraman; Linda Lundström; Hema Radhakrishnan; KTH; []
   Keywords : 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;

   Abstract : 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. READ MORE

7. 5. Neurons against Noise : Neural adaptations for dim light vision in hawkmoths

   Author : Anna Stöckl; Funktionell zoologi; []
   Keywords : vision; insect; hawkmoth; motion vision; spatial and temporal summation; dim light; neural processing;

   Abstract : All animals perceive the world through their senses, which form the basis for their decisions and motor actions. However, when these all-important senses reach their limit and cease to provide reliable information, the animal’s survival is threatened. READ MORE