SAN FRANCISCO - Reading addition benefits young adults and children with reduced accommodation and reduced near viewing distance due to low vision, a poster presented here at Academy 2010 found.
Susan J. Leat, PhD, FAAO, FCOptom, and colleagues enrolled 18 subjects between 8 and 34 years of age and used dynamic retinoscopy to determine the proper reading addition for 25 cm, 12.5 cm and habitual reading distance, the poster said. Reading performance was measured with MNRead sentences with and without the reading addition, and the number of correct words per minute was plotted against print size and maximum reading speed to determine logMAR reading acuity thresholds.
The study found an improvement in thresholds at 12.5 cm and at the habitual distance with reading addition, the poster said. An increase in the area under the curve was seen at all tested distances. There was no significant improvement in critical print size or maximum reading speed with the addition at any distance.
"Without an add, logMAR reading thresholds were significantly poorer at 12.5 cm compared to 25 cm, but this difference was no longer significant with the reading addition at 12.5 cm," the poster said.