Developments in contact lens measurement: A comparative study of industry standard geometric inspection and optical coherence tomography

Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association
Benjamin J ColdrickThomas E Drew

Abstract

The aim of this study was to compare a developmental optical coherence tomography (OCT) based contact lens inspection instrument to a widely used geometric inspection instrument (Optimec JCF), to establish the capability of a market focused OCT system. Measurements of 27 soft spherical contact lenses were made using the Optimec JCF and a new OCT based instrument, the Optimec is830. Twelve of the lenses analysed were specially commissioned from a traditional hydrogel (Contamac GM Advance 49%) and 12 from a silicone hydrogel (Contamac Definitive 65), each set with a range of back optic zone radius (BOZR) and centre thickness (CT) values. Three commercial lenses were also measured; CooperVision MyDay (Stenfilcon A) in -10D, -3D and +6D powers. Two measurements of BOZR, CT and total diameter were made for each lens in temperature controlled saline on both instruments. The results showed that the is830 and JCF measurements were comparable, but that the is830 had a better repeatability coefficient for BOZR (0.065mm compared to 0.151mm) and CT (0.008mm compared to 0.027mm). Both instruments had similar results for total diameter (0.041mm compared to 0.044mm). The OCT based instrument assessed in this study is able to match and improve...Continue Reading

References

Apr 28, 2006·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Helen A Swarbrick
Aug 15, 2013·Investigative Ophthalmology & Visual Science·James S WolffsohnMark Prince
Sep 3, 2013·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Sotiris PlainisW Neil Charman
Aug 15, 2014·Optics Letters·Karol KarnowskiMaciej Wojtkowski
Feb 24, 2015·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·Eef van der Worp, Cristian Mertz

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Citations

Oct 13, 2017·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Javier Ruiz-AlcocerDavid Madrid-Costa
Nov 10, 2020·PloS One·Bartlomiej J KaluznyIreneusz Grulkowski
Jan 12, 2021·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·Eef van der WorpPatrick Caroline
Oct 27, 2020·Applied Optics·Kentaro SaekiTatsuo Shiina
Jun 16, 2021·Scientific Reports·Patryk MlyniukBartlomiej J Kaluzny
Feb 22, 2018··Antonio FratiniVladimir Mezentsev

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