J H Elam1. 1. Low Vision Clinic Southern College of Optometry, Memphis, TN 38104, USA.
Abstract
BACKGROUND: Data were analyzed from 25 consecutive patient visits to the Low Vision Rehabilitation Service at Southern College of Optometry, during which magnification for near was recommended. METHODS: Linear regressions with analysis of variances were calculated for the results obtained from four near-different near-magnification prediction-calculation methods to determine how accurately they predicted the final near recommended magnifications. A t-test was performed to look for mean differences between calculation methods. RESULTS: No significance was found between the means of three of the calculation methods; a significant difference was found for one. However, all four near-magnification calculation methods significantly predicted final near magnification. CONCLUSIONS: Low-vision rehabilitation clinicians may feel comfortable using any of the four near-magnification methods Choice of method may be a reflection of previous method usage by the clinician. Use of the Lighthouse Near Acuity Test Chart reduces the need to calculate the near-magnification power with which to begin near-magnification testing.
BACKGROUND: Data were analyzed from 25 consecutive patient visits to the Low Vision Rehabilitation Service at Southern College of Optometry, during which magnification for near was recommended. METHODS: Linear regressions with analysis of variances were calculated for the results obtained from four near-different near-magnification prediction-calculation methods to determine how accurately they predicted the final near recommended magnifications. A t-test was performed to look for mean differences between calculation methods. RESULTS: No significance was found between the means of three of the calculation methods; a significant difference was found for one. However, all four near-magnification calculation methods significantly predicted final near magnification. CONCLUSIONS: Low-vision rehabilitation clinicians may feel comfortable using any of the four near-magnification methods Choice of method may be a reflection of previous method usage by the clinician. Use of the Lighthouse Near Acuity Test Chart reduces the need to calculate the near-magnification power with which to begin near-magnification testing.
Authors: Susan Stark; Amanda Landsbaum; Janice L Palmer; Emily K Somerville; John C Morris Journal: Can J Occup Ther Date: 2009-07 Impact factor: 1.614