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 7 of 7 for “"Autorefractor"”.
-
Αξιολόγηση της κλινικής ακρίβειας του αυτόματου διαθλασίμετρου Nidek Ark-1 και της συσκευής αμπερομετρίας iTrace βάσει των αποτελεσμάτων της υποκειμενικής διαθλαστικής εξέτασης (μέθοδος αναφοράς) / Evaluation of the clinical accuracy of the Nidek Ark-1 autorefractor and the iTrace aberrometer based on the results of subjective refraction (gold standard method)
Εισαγωγή: Η ακριβής εκτίμηση της διαθλαστικής κατάστασης του οφθαλμού αποτελεί βασική προϋπόθεση για τη σωστή οπτική διόρθωση. Η αξιολόγηση της συμφωνίας μεταξύ αντικειμενικών μεθόδων και της υποκειμενικής διαθλαστικής εξέτασης είναι απαραίτητη για την κλινική πράξη. Σκοπός: Η σύγκριση της …
-
School vision screening programmes: the benefits of including measurements of refractive error.
… agreement of the Welch Allyn Sure Sight (WASS) autorefractor. The accuracy of using visual acuity assessment alone for the detection of amblyopia was also assessed. Overall, it was found that a refractive error assessment does have a role in vision screening. Double the number of children were …
-
An investigation of the relationship between the structure and function of the myopic eye. Correlating the optical, functional and structural aspects of ametropia in young adult humans.
… position of the Shin-Nippon NVision-K 5001 autorefractor, allowing consistent alignment with other instruments used in this research. Secondly, spectacles could be used to provide comparable vision to contact lenses in the visual performance studies. In the main experimental parts of this …
-
Assessment of Ocular Accommodation in Humans
… affect the onset of presbyopia. An open-field autorefractor with badal adaption was used to examine accommodative dynamic profiles under varying demands of vergence. From this data a new metric for assessing the time for accommodative change was derived. Furthermore this thesis describes a …
-
The Effect of Age on Dark Focus Distance and Visual Information Transfer Rate
… was assessed objectively using the modified autorefractor, a newly developed method to continuously monitor the accommodation process. The mean dark focus distances for younger, middle-aged, young-old, and old-old adults were 64.5±6.6, 73.4±20.6, 84.4±29, and 92.1±33.4 cm, respectively. There …
-
The Age-Related Dynamic Accommodative Characteristics Associated With Light Intensity and Chromaticity
Visual accommodation plays a critical role in one's visual perception and activities of daily living. The age-related accommodation loss poses a greater risk to older adults' safety and independence. Although extensive effort has been made to study the effects of aging on accommodation, the …
-
Evaluation of an Objective Visual Image Quality-Based Method to Identify Spectacle Corrections for Individuals with Keratoconus
… and power when appropriate) beginning from an autorefractor measurement when possible. To assess the relative performance of the two methods of identifying refraction, visual acuity and subjective preference were assessed under varied viewing conditions. Second, having examined the performance …