The Effect of Bifocal Add on Accommodative Lag in Myopic Children with High Accommodative Lag

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dc.contributor.authorBerntsen, David A.
dc.contributor.authorMutti, Donald O.
dc.contributor.authorZadnik, Karla
dc.date.accessioned2017-12-06T21:25:36Z
dc.date.available2017-12-06T21:25:36Z
dc.date.issued2010-12
dc.description.abstractPurpose: To determine the effect of a bifocal add and manifest correction on accommodative lag in myopic children with high accommodative lag, who have been reported to have the greatest reduction in myopia progression with progressive addition lenses (PALs). Methods: Monocular accommodative lag to a 4-D Badal stimulus was measured on two occasions 6 months apart in 83 children (mean ± SD age, 9.9 ± 1.3 years) with high lag randomized to wearing single-vision lenses (SVLs) or PALs. Accommodative lag was measured with the following corrections: habitual, manifest, manifest with +2.00-D add, and habitual with +2.00-D add (6-month visit only). Results: At baseline, accommodative lag was higher (1.72 ± 0.37 D; mean ± SD) when measured with manifest correction than with habitual correction (1.51 ± 0.50; P < 0.05). This higher lag with manifest correction correlated with a larger amount of habitual undercorrection at baseline (r = −0.29, P = 0.009). A +2.00-D add over the manifest correction reduced lag by 0.45 ± 0.34 D at baseline and 0.33 ± 0.38 D at the 6-month visit. Lag results at 6 months were not different between PAL and SVL wearers (P = 0.92). Conclusions: A +2.00-D bifocal add did not eliminate accommodative lag and reduced lag by less than 25% of the bifocal power, indicating that children mainly responded to a bifocal by decreasing accommodation. If myopic progression is substantial, measuring lag with full correction can overestimate the hyperopic retinal blur that a child most recently experienced. (ClinicalTrials.gov number, NCT00335049.)
dc.description.departmentVision Sciences
dc.identifier10.1167/iovs.09-4417
dc.identifier.citationCopyright 2010 Investigative Ophthalmology & Visual Science. Recommended citation: Berntsen, David A., Donald O. Mutti, and Karla Zadnik. "The effect of bifocal add on accommodative lag in myopic children with high accommodative lag." Investigative ophthalmology & visual science 51, no. 12 (2010): 6104-6110. doi: 10.1167/iovs.09-4417 URL: http://iovs.arvojournals.org/article.aspx?articleid=2126241. Reproduced in accordance with licensing terms and with author permission.
dc.identifier.urihttp://hdl.handle.net/10657/2053
dc.language.isoen_US
dc.publisherInvestigative Ophthalmology & Visual Science
dc.titleThe Effect of Bifocal Add on Accommodative Lag in Myopic Children with High Accommodative Lag
dc.typeArticle

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