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Eye & Contact Lens: Science & Clinical Practice:
doi: 10.1097/ICL.0b013e3182654994
Article

Changes in Accommodation and Ocular Aberration With Simultaneous Vision Multifocal Contact Lenses

Ruiz-Alcocer, Javier Ph.D.; Madrid-Costa, David Ph.D.; Radhakrishnan, Hema Ph.D.; Ferrer-Blasco, Teresa Ph.D.; Montés-Micó, Robert Ph.D.

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Abstract

Objective: The aim of this study was to evaluate ocular aberration changes through different simultaneous vision multifocal contact lenses (CLs).

Methods: Eighteen young-adult subjects with a mean age of 29.8±2.11 years took part. Changes in accommodative response, spherical aberration (

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), horizontal coma (

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), vertical coma (

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), and root mean square (RMS) of higher-order aberrations (HOAs, third to sixth orders) were evaluated. Measurements were obtained with a distance-single vision CL and 2 aspheric multifocal CLs of simultaneous focus center-near design (PureVision Low Add and PureVision High Add) for 2 accommodative stimuli (−2.50 and −4.00 D). All measurements were performed monocularly with a Hartmann–Shack aberrometer (IRX-3; Imagine Eyes, Orsay, France).

Results: No statistically significant differences were found in accommodative responses to −2.50- and −4.00-D stimuli between the single vision CL and the 2 multifocal CLs. Spherical aberration was found to decrease and become more negative with accommodation for both stimuli with all three CLs. Horizontal coma decreased significantly with accommodation (−2.5- and −4.00-D stimuli) for the distance-single vision CLs (P=0.002 and P=0.003). No differences were found in vertical coma Zernike coefficients. The RMS of HOAs was found to decrease only with the single vision CLs for both stimuli (P<0.01).

Conclusions: Data obtained in this study suggest that in young subjects, the multifocal CLs studied do not induce large changes in accommodative response compared with the distance-single vision CLs. Spherical aberration reduced significantly with accommodation.

© 2012 Lippincott Williams & Wilkins, Inc.

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