Do small-aperture presbyopic corrections influence the visual field?

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
David A AtchisonW N Charman

Abstract

To explore the effect of small-aperture optics, designed to aid presbyopes by increasing ocular depth-of-focus, on measurements of the visual field. Simple theoretical and ray-tracing models were used to predict the impact of different designs of small-aperture contact lenses or corneal inlays on the proportion of light passing through natural pupils of various diameters as a function of the direction in the visual field. The left eyes of five healthy volunteers were tested using three afocal, hand-painted opaque soft contact lenses (www.davidthomas.com). Two were opaque over a 10 mm diameter but had central clear circular apertures of 1.5 and 3.0 mm in diameter. The third had an annular opaque zone with inner and outer diameters of 1.5 and 4.0 mm, approximately simulating the geometry of the KAMRA inlay (www.acufocus.com). A fourth, clear lens was used for comparison purposes. Visual fields along the horizontal meridian were evaluated up to 50° eccentricity with static automated perimetry (Medmont M700, stimulus Goldmann-size III; www.medmont.com). According to ray-tracing, the two lenses with the circular apertures were expected to reduce the relative transmittance of the pupil to zero at specific field angles (around 60° for...Continue Reading

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Citations

Jan 16, 2016·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Leon N DaviesW Neil Charman
Mar 28, 2016·Zeitschrift für medizinische Physik·Timo EppigAchim Langenbucher
Jul 26, 2016·Biomedical Optics Express·Sergio Bonaque-GonzálezNorberto López-Gil
Jul 13, 2018·Journal of Refractive Surgery·José J CastroMiriam Casares-López
Jan 11, 2019·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·W Neil Charman
Nov 18, 2019·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Pete S Kollbaum, Arthur Bradley
Nov 22, 2016·Biomedical Optics Express·Eleni PapadatouNorberto López-Gil
Jul 1, 2017·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Stephen J Vincent
May 3, 2019·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·W Neil CharmanDavid A Atchison
May 18, 2020·Investigative Ophthalmology & Visual Science·Viswanathan RamasubramanianArthur Bradley
Dec 22, 2017·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Renfeng XuArthur Bradley
Dec 22, 2017·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Essam S AlmutlebShirin E Hassan
Oct 19, 2017·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·W Neil Charman
Nov 6, 2020·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Renfeng XuArthur Bradley

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