Objective Estimation of Visual Acuity with Preferential Looking
نویسندگان
چکیده
منابع مشابه
Objective estimation of visual acuity with preferential looking.
PURPOSE A novel preferential looking (PL) procedure that uses quantitative analysis of visual scanning parameters is presented. METHODS Nine adult subjects were presented with a set of 14 visual stimuli (stimuli included three uniform gray fields and one field with black-and-white square wave gratings) spanning the range of spatial frequencies from 1.5 cyc/deg to 35.1 cyc/deg (1.3 logMAR to -...
متن کامل[A new objective visual acuity test: an automated preferential looking].
BACKGROUND The Preferential Looking test using Teller acuity cards is widely used for preverbal children but has some weaknesses, in particular because it is examiner dependent and at best half-objective. We tested a new automated method in a pilot study. PATIENTS AND METHODS In our preferential looking setting we project separate images into the left and right eye. This permits measuring eac...
متن کامل'Preferential looking' for monocular and binocular acuity testing of infants.
A method is described for obtaining rapid and reliable estimates of acuity in infants, for both monocular and binocular viewing. The method depends on 'preferential looking', where the infant prefers to look at a striped pattern rather than a blank screen of matched mean luminance. A staircase procedure for testing is followed, with observations being recorded by a 'blind' observer (who does no...
متن کاملComparison between grating acuity measured by visual tracking and preferential looking in infants.
BACKGROUND The aim of this study was to compare the visual acuity measured by visual tracking and by preferential looking. METHODS We examined 51 healthy full-term infants between three and 93 days of age. Visual acuity was tested with two different methods. One method was visual tracking (smooth and saccadic pursuit), recorded with an infrared photo-oculographic technique. For stimulation of...
متن کاملGrating visual acuity using the preferential-looking method in elderly nursing home residents.
PURPOSE To assess the performance of two approaches to visual acuity testing in a group of nursing home residents with cognitive impairment. The study was a cross-sectional comparison of the effectiveness of two tests of visual acuity. METHODS Nursing home residents participating in a clinical trial were tested with both recognition acuity charts and grating acuity cards (Teller) by masked ob...
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ژورنال
عنوان ژورنال: Investigative Opthalmology & Visual Science
سال: 2011
ISSN: 1552-5783
DOI: 10.1167/iovs.09-4911