Now showing items 1-7 of 7
Psychometric Properties of the NEI-RQL-42 Questionnaire in Keratoconus
(Association for Research in Vision and Ophthalmology, Inc., 2012-10)
Purpose.: To assess the psychometric properties of the National Eye Institute Refractive Error Quality of Life (NEI-RQL-42) questionnaire in keratoconus and compare these findings to patients with refractive error correction ...
Reengineering the Glaucoma Quality of Life-15 Questionnaire with Rasch Analysis
(Association for Research in Vision and Ophthalmology, Inc., 2011-08)
Purpose.: To investigate, using Rasch analysis, whether the 15-item Glaucoma Quality of Life-15 (GQL-15) forms a valid scale and to optimize its psychometric properties. Methods.: One hundred eighteen glaucoma patients ...
A Comprehensive Evaluation of the Precision (Repeatability and Reproducibility) of the Oculus Pentacam HR
(Association for Research in Vision and Ophthalmology, Inc., 2011-09)
Purpose.: To evaluate the precision (repeatability and reproducibility) of the Pentacam HR (high-resolution) tomographer (Oculus, Wetzlar, Germany) across a large range of measurement parameters. Methods.: A randomly ...
Subjective Quality of Vision Before and After Cataract Surgery
(American Medical Association, 2012-11)
Objective To investigate the effect of cataract surgery on subjective quality of vision. Methods The Quality of Vision (QoV) questionnaire (Italian translation) was completed before and 3 months after cataract surgery in ...
Establishing Levels of Indications for Cataract Surgery: Combining Clinical and Questionnaire Data into a Measure of Cataract Impact
(Association for Research in Vision and Ophthalmology, Inc., 2012-03)
Purpose.: To develop a model for establishing indications for cataract surgery that incorporates clinical and questionnaire data on a single linear scale using Rasch analysis. Methods.: In this prospective study, 293 ...
The Importance of Rating Scale Design in the Measurement of Patient-Reported Outcomes Using Questionnaires or Item Banks
(Association for Research in Vision and Ophthalmology, Inc., 2012-06)
Purpose.: To investigate the effect of rating scale designs (question formats and response categories) on item difficulty calibrations and assess the impact that rating scale differences have on overall vision-related ...