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Effect of Customized Near Addition Lenses on Transient Myopia Induced by Near-work by Jiang, Bai-Chaun is a Medicine article available to read on EtoBox.

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Purpose: To verify whether optimal near add power can reduce near-work induced transient myopia (NITM). Methods: Eighteen subjects including nine progressive myopes (PMs) and nine stable myopes (SMs) were involved in this study. We measured the accommodative error and the near phoria at 40 cm under fully corrected conditions for each subject. These findings were then used to determine optimal near-add power for each subject based on formulae derived from a previous study. Under both with and without near-add conditions, NITM was obtained by comparing the refractions immediately before and after performing continuous computer work at 40 cm for an hour. The refraction was determined by a COAS aberrometer. Results: Using customized near-addition lenses (C-ADD) we found significantly decreased retinal defocus from 0.49 ± 0.12 (SD) D to 0.08 ± 0.11 D. The near phoria showed a significant exophoric shift from -1.84 ± 1.95 prism diopter (pd) to -5.37 ± 1.63 pd, but was still in the normal range. We also found that the differences in NITM between the two groups and between the two conditions (ie, with and without C-ADD) were both significant. Further comparisons indicated that the NITM in

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Author

Jiang, Bai-Chaun

Publisher

Dove Press Ltd.; Dove Medical Press; Dove Medical Press Ltd.; [Auckland N.Z.]: Dove Medical Press, c2009-; Informa UK Limited (ISSN 1179-2752)

Published

2010

Language

EN

Field

Medicine (Health Sciences)