Now showing items 128-147 of 228

    • Lagrange: A Three-dimensional Analytic Lens Design Method for Spectacles Application 

      Lu, Yang (University of Waterloo, 2014-01-02)
      Purpose: traditional optical design is a numerical process based on ray tracing theory. The traditional method has the limitation of the application of the spectacle lens because of the necessity of initial configurations ...
    • Lipid Deposition on Hydrogel Contact Lenses 

      Lorentz, Holly (University of Waterloo, 2006)
      The primary objective of this study was to quantify and characterise lipid deposition on soft (hydrogel) contact lenses, particularly those containing siloxane components. Studies involving a variety of <em>in vitro</em> ...
    • Longitudinal impact of newly acquired closed-circuit televisions (CCTV) on quality of life for low vision patients 

      Huber, Jessica (University of Waterloo, 2007-08-09)
      Ongoing efforts to quantify changes in quality of life attributable to low vision rehabilitation have focused on the utility of a single test instrument to measure this multidimensional concept. It is hypothesized that ...
    • Low Vision Service Provision by Optometrist: A Nationwide Survey 

      Lam, Hoi Yi Norris (University of Waterloo, 2014-01-29)
      Purpose: The prevalence of age-related visual impairment is projected to increase as the Canadian population ages. As a result, the demand for low vision service is also projected to increase. However, there is a lack ...
    • Lysozyme Deposition Studies on Silicone Hydrogel Contact Lens Materials 

      Nagapatnam Subbaraman, Lakshman (University of Waterloo, 2005)
      Over 60 proteins have been detected in the tear film and among these lysozyme has attracted the greatest attention. Several techniques for elucidating the identity, quantity and conformation of lysozyme deposited on soft ...
    • Mitochondrial Function and Optical Properties of the Crystalline Lens 

      Olsen, Kenneth Wayne (University of Waterloo, 2009-01-15)
      The crystalline lens is a unique cellular organ that performs metabolic processes while maintaining optical functionality. Mitochondria play a vital role in providing the cell with the energy necessary for these metabolic ...
    • MKH-Haase Charts of Binocular Vision Measurements: Repeatability and Validity of Associated Phoria and Stereotests 

      Alhassan, Mosaad (University of Waterloo, 2014-01-29)
      Abstract Introduction: H.J.-Haase developed a systematic set of tests for evaluating binocular vision called the Pola Test. The Pola Test measures associated phoria and stereoacuity at distance and near using a variety ...
    • Modeling age-related ocular media changes using the Farnsworth Munsell (FM) 100-Hue Test 

      Opoku-Yamoah, Victor (University of Waterloo, 2021-08-31)
      Introduction: Evaluation of chromatic discrimination can help diagnose and monitor diseases and disorders of the visual system; however, normal age-related changes can make diagnosing colour discrimination losses challenging. ...
    • Modeling In Vitro Lipid Deposition on Silicone Hydrogel and Conventional Hydrogel Contact Lens Materials 

      Lorentz, Holly Irene (University of Waterloo, 2012-01-12)
      Purpose: To examine the variables that influence lipid deposition on conventional and silicone hydrogel contact lens materials and to build a physiologically relevant in vitro model of lipid deposition on contact lenses. ...
    • Monocular Adaptation of Vestibulo-Ocular Reflex (VOR) 

      Sehizadeh, Mina (University of Waterloo, 2005)
      Purpose: This study asks whether active horizontal angular Vestibulo-Ocular Reflex (VOR) gain is capable of monocular adaptation after 4 hours of wearing 10 dioptres (D) of induced anisometropia in healthy human adults. ...
    • Morphometric Characterization of Limbal Vasculature using Ultra-high Resolution Optical Coherence Tomography 

      Alabi, Emmanuel (University of Waterloo, 2013-09-27)
      Purpose: The aim of the present study was to compare and investigate morphometric characteristics of limbal vasculature within the superior and inferior limbal regions using ultra-high resolution optical coherence ...
    • Motion Processing of Reverse Phi 

      Kuppuswamy Parthasarathy, Mohana (University of Waterloo, 2019-11-18)
      Introduction: When the contrast of the successive images is reversed for a target in an apparent motion stimulus, the perceived direction is reversed, i.e., opposite of phi motion, which is an integration of the sequential ...
    • MRI guided brain stimulation without the use of a neuro-navigation system. 

      Vaghefi, Ehsan; Cai, Peng; Fang, Fang; Byblow, Winston D.; Stinear, Cathy M.; Thompson, Benjamin (Hindawi Publishing, 2015-01-01)
      A key issue in the field of noninvasive brain stimulation (NIBS) is the accurate localization of scalp positions that correspond to targeted cortical areas. The current gold standard is to combine structural and functional ...
    • Multisensory attention training for treatment of tinnitus 

      Spiegel, Daniel P.; Linford, T.; Thompson, Benjamin; Petoe, Matt A.; Kobayashi, K.; Stinear, Cathy M.; Searchfield, Grant D. (Springer Nature, 2015-05-28)
      Tinnitus is the conscious perception of sound with no physical sound source. Some models of tinnitus pathophysiology suggest that networks associated with attention, memory, distress and multisensory experience are involved ...
    • Near addition lenses as a tool to investigate vergence adaptation in myopic children 

      Sreenivasan, Vidhyapriya (University of Waterloo, 2011-08-12)
      Accommodation and vergence are two interacting ocular motor systems that function to maintain clear and single vision across a wide range of distances. Sustained fixation results in the adaptation of these ocular motor ...
    • Neonatal Glycemia and Neurodevelopmental Outcomes at 2 Years 

      McKinlay, Christopher J.D.; Alsweiler, Jane M.; Ansell, Judith M.; Anstice, Nicola S.; Chase, J. Geoffrey; Gamble, Gregory D.; Harris, Deborah L.; Jacobs, Robert J.; Jiang, Yannan; Paudel, Nabin; Signal, Matthew; Thompson, Benjamin; Wouldes, Trecia; Yu, Tzu-Ying; Harding, Jane E. (Massachusetts Medical Society, 2015-10-15)
      Neonatal hypoglycemia is a common and readily treatable risk factor for neurologic impairment in children. Although associations between prolonged symptomatic neonatal hypoglycemia and brain injury are well established,1 ...
    • Neural modulation of the human visual cortex 

      Abuleil, Dania (University of Waterloo, 2020-09-30)
      Neuroplasticity is a phenomenon that refers to the brain’s ability to reorganize, strengthen, and form neural connections, a process that becomes increasingly more difficult with age. Gamma amino-butyric acid (GABA), the ...
    • A New Portable Digital Meniscometer 

      Bandlitz, Stefan; Purslow, Christine; Murphy, Paul J.; Pult, Heiko; Bron, Anthony J. (Wolters Kluwer, 2014-01)
      Purpose: The aims of this study were (i) to develop a new portable slit-lamp mounted digital meniscometer (PDM) and (ii) to test its accuracy and repeatability compared to the existing Yokoi et al. videomeniscometer ...
    • Non-invasive brain stimulation of the primary visual cortex of healthy adults and individuals with amblyopia 

      DONKOR, RICHARD (University of Waterloo, 2021-05-03)
      Introduction: Amblyopia is a neurological condition that affects the visual cortex and causes visual deficits, typically in one eye. Recovery from amblyopia requires significant visual cortex neuroplasticity to allow for ...
    • A novel Automatic Optic Disc and Cup Image Segmentation System for Diagnosing Glaucoma using RIGA dataset 

      Almazroa, Ahmed (University of Waterloo, 2016-04-07)
      The optic nerve head (ONH) of the retina is a very important landmark of the fundus and is altered in optic nerve pathology especially glaucoma. Numerous imaging systems are available to capture the retinal fundus and from ...

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