Increasing negative spherical aberration with soft contact lenses improves high and low contrast visual acuity in young adults

Rae, Sheila M. and Allen, Peter M. and Radhakrishnan, Hema and Theagarayan, Baskar Pitty and Price, Holly C. and Sailoganathan, Ananth and Calver, Richard I. and O'Leary, Daniel J. (2009) Increasing negative spherical aberration with soft contact lenses improves high and low contrast visual acuity in young adults. Ophthalmic and Physiological Optics: The Journal of the College of Optometrists. ISSN 0275-5408

Full text not available from this repository.

Abstract

Purpose:  To evaluate the effects of a customised manipulation of spherical aberration (SA) on the high and low contrast visual acuities and contrast sensitivity of young adult myopes. Methods:  A placebo-controlled double masked trial of customised spherical aberration controlling soft contact lenses was undertaken in myopes aged 15–23. Participants wore customised soft contact lenses with either (i) zero spherical aberration or (ii) negative spherical aberration that resulted in a net SA (eye plus lens) of −0.1 micron. High and low contrast log MAR visual acuities and Pelli Robson contrast sensitivity were assessed in 196 eyes of 98 subjects after a period of 12 months wearing the lenses. Results:  Both high and low contrast acuities were significantly better in the group wearing the contact lenses with negative spherical aberration (high contrast log MAR, p = 0.043; low contrast log MAR, p = 0.043) which was not due to differences in residual astigmatism or pupil size between the two groups. Pelli Robson contrast sensitivity was not significantly different in the two groups. Conclusions:  Manipulation of spherical aberration, taking account of the participants’ baseline level of aberration, can cause statistically significant improvements in high and low contrast distance visual acuity although these improvements are too small in magnitude to be of clinical significance.

Item Type: Journal Article
Additional Information: Citation: Rae, Sheila M., et al., 2009. Increasing negative spherical aberration with soft contact lenses improves high and low contrast visual acuity in young adults. Ophthalmic and Physiological Optics: The Journal of the College of Optometrists, 29(6), pp.593-601..
Faculty: Faculty of Science & Technology
Depositing User: Mr I Walker
Date Deposited: 20 Dec 2012 10:49
Last Modified: 03 Jul 2017 09:25
URI: http://arro.anglia.ac.uk/id/eprint/263343

Actions (login required)

Edit Item Edit Item