Abstract
Purpose: To assess the perceived importance of visual field loss on vision-related quality of life for a group of patients with glaucoma. Methods: A group of 108 subjects with glaucoma and visual acuity better than 20/40 were given a battery of tests including clinical assessment, visual function measures, and quality of life questionnaires. Within the latter was a choice-based conjoint analysis which is a way of estimating patient utilities (i.e., values or part-worths) associated with different visual outcomes. Five attribute outcomes from a principal component analysis of the National Eye Institute-Visual Functioning Questionnaire (NEI-VFQ) were presented for conjoint analysis at three different levels of difficulty; these were central and near vision, peripheral vision, darkness and glare, household chores, and outdoor mobility. Results: Subjects rated peripheral visual loss and its associated behavioural problems as less important than tasks associated with central vision and outdoor mobility. While ...
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