In vitro power profiles of multifocal simultaneous vision contact lenses.

PURPOSE To evaluate the power profile of multifocal contact lenses (CLs) using a new technology based on quantitative deflectometry. METHODS The Nimo TR1504 was used to analyze the power distribution of multifocal CLs. The CLs under study were: Air Optix Aqua Multifocal Low, Medium and High Addition and Focus Progressives. Three lenses of each model were considered. RESULTS All multifocal CLs showed a power profile characterized by a change toward more positive power values when aperture sizes become smaller. The near refractive addition of the lenses under study was +2.61 D, +1.44 D, +1.30 D and +0.30 D for the Focus Progressives, the Air Optix Aqua Multifocal High, Medium Add and Low Add, respectively. The refractive power of the Focus Progressives did not reach the value of the nominal distance power until a radial distance of 0.9 mm from the center of the lens. For the Air Optix Aqua Multifocal Low Add the distance nominal power was reached at a radial distance of 1.5mm from the center of the lens, whereas this occurred at a distance of 1.8mm for the Air Optix Aqua Multifocal Medium and High Add. CONCLUSION The relation between the pupil diameter of the patients and the power profile of these CLs has a crucial implication on the final distance correction and near addition that these lenses provide to patients. Practitioners should know the power profile of these CLs and measure the pupil diameter of each patient in different situations in order to carry out a customized fitting.

[1]  D D Koch,et al.  Pupillary size and responsiveness. Implications for selection of a bifocal intraocular lens. , 1991, Ophthalmology.

[2]  Robert Montés-Micó,et al.  Visual performance of two simultaneous vision multifocal contact lenses , 2013, Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians.

[3]  Luc Joannes,et al.  The reproducibility of a new power mapping instrument based on the phase shifting schlieren method for the measurement of spherical and toric contact lenses. , 2010, Contact lens & anterior eye : the journal of the British Contact Lens Association.

[4]  R. Montés-Micó,et al.  Visual Comparison of an Artificial Pupil Contact Lens to Monovision , 2012, Optometry and vision science : official publication of the American Academy of Optometry.

[5]  Ping Situ,et al.  Utility of Short-Term Evaluation of Presbyopic Contact Lens Performance , 2009, Eye & contact lens.

[6]  Luc Joannes,et al.  Phase-shifting schlieren: high-resolution quantitative schlieren that uses the phase-shifting technique principle. , 2003, Applied optics.

[7]  Teresa Ferrer‐Blasco,et al.  Stereoacuity with balanced presbyopic contact lenses , 2011, Clinical & experimental optometry.

[8]  P. Morgan,et al.  An international survey of contact lens prescribing for presbyopia , 2010, Clinical & experimental optometry.

[9]  Navneet Gupta,et al.  Visual Comparison of Multifocal Contact Lens to Monovision , 2009, Optometry and vision science : official publication of the American Academy of Optometry.

[10]  Sotiris Plainis,et al.  Through‐focus performance with multifocal contact lenses: effect of binocularity, pupil diameter and inherent ocular aberrations , 2013, Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians.

[11]  Philip Cooper,et al.  Visual performance of a multi-zone bifocal and a progressive multifocal contact lens. , 2002, The CLAO journal : official publication of the Contact Lens Association of Ophthalmologists, Inc.

[12]  Robert Montés-Micó,et al.  Age‐related changes in the human visual system and prevalence of refractive conditions in patients attending an eye clinic , 2008, Journal of cataract and refractive surgery.

[13]  G. Mitchell,et al.  Comparison of Multifocal and Monovision Soft Contact Lens Corrections in Patients With Low-Astigmatic Presbyopia , 2006, Optometry and vision science : official publication of the American Academy of Optometry.

[14]  Teresa Ferrer-Blasco,et al.  Stereoacuity with Simultaneous Vision Multifocal Contact Lenses , 2010, Optometry and vision science : official publication of the American Academy of Optometry.

[15]  David A. Atchison,et al.  Aberrations of emmetropic subjects at different ages , 2008, Vision Research.

[16]  R. Montés-Micó,et al.  Visual Performance of a Multifocal Toric Soft Contact Lens , 2012, Optometry and vision science : official publication of the American Academy of Optometry.

[17]  S A Burns,et al.  Age-related changes in monochromatic wave aberrations of the human eye. , 2001, Investigative ophthalmology & visual science.

[18]  In vitro power profiles of daily disposable contact lenses. , 2013, Contact lens & anterior eye : the journal of the British Contact Lens Association.

[19]  Lawrence Start.  Presbyopia: Recent Research and Reviews from the Third International Symposium , 1987 .

[20]  J. González-Méijome,et al.  Adaptation to Multifocal and Monovision Contact Lens Correction , 2013, Optometry and vision science : official publication of the American Academy of Optometry.