Ophthalmology (Eye & Ear Hospital) - Research Publications

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Subject: eye research × Author: WEIH, LEANN × Author: Brown, Shayne ×

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    Prevalence of amblyopia and associated refractive errors in an adult population in Victoria, Australia
    Brown, Shayne A. ; Weih, LeAnn M. ; Fu, Cara L. ; Dimitrov, Peter N. ; Taylor, Hugh R. ; McCarty, Catherine A. (Swets & Zeitlinger, 2000)
    The study aimed to describe the prevalence of amblyopia and associated refractive errors among an adult Australian population. The Visual Impairment Project (VIP) is a population-based study of age-related eye disease in the state of Victoria, Australia. Data were collected through standardised interviews and orthoptic and ophthalmic dilated examinations. Amblyopia was defined as best-corrected visual acuity of 6/9 or worse in the absence of any pathological cause. The participants were 3,265 urban residents and 1,456 rural residents of the VIP ranging in age from 40-92 years (mean = 59 years; 53% female). The prevalence of unilateral amblyopia was 3.06 % (95% C.I. 2.59, 3.53). Amblyopia was not found to be statistically different by age group (P=0.096), gender (p=0.675), or place of birth (p=0.14). Anisometropia was statistically more common (p<0.001) in amblyopic cases (51.1% ) compared to the normal population (9.7%), and 54% of amblyopic eyes had visual acuity of worse than 6/12. Amblyopia is a significant cause of unilateral reduced visual acuity in a population aged 40 years and older. Anisometropia was more prevalent and the degree of anisometropia was greater in the amblyopic group compared with the normal population. Oblique astigmatism was more prevalent in the aIpblyopic group compared with the normal population.
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    Assessment of adult stereopsis using the Lang 1 Stereotest: a pilot study
    Brown, Shayne ; Weih, LeAnn ; Mukesh, Nanjan ; MCCARTY, CATHERINE ; TAYLOR, HUGH ( 2001)
    Background and Purpose: To assess the use of the Lang 1 Stereotest as a vision-screening test for adults, for which little is known or reported. Method: The Lang 1 Stereotest was administered to 292 consecutive participants of the Visual Impairment Project (VIP) five year followup study, which is a population based study of eye disease in Melbourne, Australia. 56.9% were female. The mean age was 59.4 years, range 44-90 years. A "positive" stereoscopic response was recorded where the stereoscopic target image was correctly named; a "partial positive" response where depth was appreciated but the shape could not be named; and a "negative" response where there was no appreciation of a stereo effect. The responses were further categorized so that the test was either "passed" or "failed". A "pass" score was 3/3 positive responses; 3/3 partial positive responses or 2/3 positive and/or partial positive responses where the negative response was at the 550" of arc stereoacuity level. "Failure" was 3/3 negative responses and 2/3 negative responses where the positive or partial positive response as at the 1200" level. (For complete abstract open document)