Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 136 for “"Visual acuity"”.
-
Factors which determine visual acuity
… and subcortical projection of the rabbits' visual field, with particular emphasis on the magnification that certain regions of the visual field undergo in the process.
-
Operant Assessment of Visual Acuity in the Profoundly Retarded
The problem. Traditional subjective visual acuity tests are not effective in testing nonverbal, profoundly retarded individuals. The present paper investigated the use of operant conditioning procedures in determining threshold crossings and compared the effectiveness of the staircase and …
-
Text orienting cues: Enhancing dynamic visual acuity for targets of unknown origin
Dynamic Visual Acuity (DVA) refers to an observer's ability to resolve a critical detail in a visual target under conditions of relative motion between an observer and a target. DVA research has conventionally used visual targets originating from a single fixation point and moving in a predictable …
-
The effects of random linear target direction in a computerized Dynamic Visual Acuity task
Research on Dynamic Visual Acuity (DVA) to date has conventionally used visual targets originating from a single fixation point and moving in a single, predictable linear direction. These procedures (presumably dictated by apparatus constraints) ensured the observer knew when and from where the …
-
Comparison of Improvement Rates between Distance and Near Visual Acuity in Children with Unilateral Amblyopia
I. 서론 1 II. 연구대상 및 방법 4 III. 결과 7 IV. 고찰 16 V. 결론 21 참고문헌 22 ABSTRACT 26
-
Peripheral Dynamic Visual Acuity Under Randomized Tracking Task Difficulty, Target Velocities, and Direction of Target Presentation
Dynamic Visual Acuity (DVA) in the visual periphery has not been extensively studied. DVA is a measure of an observer's ability to resolve critical details in a target when there is relative motion between the target and the observer. This dissertation examined static and dynamic acuity in the …
-
The relationship between motor proficiency, bilateral vestibular hypofunction and dynamic visual acuity in children with congenital or early acquired sensorineural hearing loss
… performance, vestibular function and dynamic visual acuity, and the nature and extent of interaction between these in children between the ages of four and fourteen years with congenital and early acquired sensorineural hearing loss. Motor performance was evaluated by means of the Movement …
-
Health outcomes from cataract surgery using phacoemulsification
… purpose of this study was to investigate patient visual acuity outcomes after the use of phacoemulsification during cataract surgery. The visual acuity outcomes from 140 consecutive surgeries were divided into three groups of improvement. One hundred-five eyes obtained better than or equal to …
-
Myopia management leadership and modern orthokeratology self-learning in troubleshooting
… and significantly improve the patient's 20/20 visual acuity: twice (2.24 times) in uncorrected visual acuity & 1.35 times in best-corrected visual acuity. ▪ Lastly, the customized lenses should be rescripted for high cylinder patients with high or low myopic status.
-
Audit of cataract surgery at Groote Schuur Hospital
To report on the visual outcomes and complications of cataract surgery done at a South African training hospital. Literature review and retrospective observational study of all patients undergoing cataract surgery on the cataract surgery project lists during 2006. Follow-up occurred till last …
-
Beyond eye charts, the daily challenges for people with impaired vision
Visual impairment, which affected an estimated 596.5 million people globally in 2020, can lead to numerous challenges in daily life. However, those challenges can’t always be captured by standard clinical vision tests, such as visual acuity tests, contrast sensitivity tests, or visual field tests. …
-
Effects of combination therapies on age-related macular degeneration
… were reviewed, comparing changes in average visual acuity, foveal thickness, and number of injections administered. PDT and anti-VEGF was concluded to be the most efficient of the three, requiring fewer injections while showing an increase in visual acuity similar to anti-VEGF monotherapy.
-
Reasons for poor or borderline cataract surgical outcomes at Nkhoma hospital in Malawi: a retrospective analysis
… 2019. All people that recorded a post-operative visual acuity of 6/18 and worse in either or both eyes were included in the study. Data was collected on variables concerning demographics, aspects of referral, preoperative examination, intraoperative findings and post- operative examination. The …
-
Functional aspects of blur adaptation in human vision. A study of the mechanism of blur adaptation in human vision - its origin and scope evidenced using subjective and objective procedures.
Sensory adaptation to blur improves visual acuity under defocused conditions. This phenomenon has been successfully demonstrated using subjective measures of acuity and is known as blur adaptation. This study investigates aspects of the mechanism of blur adaptation in human vision using subjective …
-
The effects of target vibration on the human contrast sensitivity function
… been conducted on the effects of vibration on visual acuity. The human contrast sensitivity function (CSF) has also been studied extensively as a predictor of visual performance under real-world conditions. However, no previous studies have combined the two lines of research and examined the …
-
The Influence of Vestibular-Ocular Reflex Training on Static and Dynamic Postural Stability in Subjects with Chronic Ankle Instability
… protocols to improve postural stability, dynamic visual acuity and gaze stabilization among chronic ankle instability (CAI) patients. Design: Randomized controlled trial. Setting: Research laboratory setting. Participants: 16 physically-active women and men (age, 22.2+1.5 yrs; hgt, 171.1+7.0 cm; …
-
The Visual Ecology of the Cleaner Shrimp-Client Fish Mutualism
… it has been suggested that these signals are visual, and function to identify cleaners as helpers, rather than food, and perhaps to identify clients as seeking cleaning rather than a meal. </p><p>The broad goal of this dissertation was to examine the cleaner shrimp-client fish mutualism by …
Page 1 of 7