How should initial fit inform soft contact lens prescribing

Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association
Nikolay BoychevJames S Wolffsohn

Abstract

To investigate how initial HEMA and silicone-hydrogel (SiHy) contact lens fit on insertion, which informs prescribing decisions, reflect end of day fit. Thirty participants (aged 22.9±4.9 years) were fitted contralaterally with HEMA and SiHy contact lenses. Corneal topography and tear break-up time were assessed pre-lens wear. Centration, lag, post-blink movement during up-gaze and push-up recovery speed were recorded after 5,10,20min and 8h of contact lens wear by a digital slit-lamp biomicroscope camera, along with reported comfort. Lens fit metrics were analysed using bespoke software. Comfort and centration were similar with the HEMA and SiHy lenses (p>0.05), but comfort decreased with time (p<0.01) whereas centration remained stable (F=0.036, p=0.991). Movement-on-blink and lag were greater with the HEMA than the SiHy lens (p<0.01), but movement-on-blink decreased with time after insertion (F=22.423, p<0.001) whereas lag remained stable (F=1.967, p=0.129). Push-up recovery speed was similar with the HEMA and the SiHy lens 5-20min after insertion (p>0.05), but was slower with SiHy after 8h wear (p=0.016). Lens movement on blink and push-up recovery speed was predictive of the movement after 8h of wear after 10-20min SiHy we...Continue Reading

References

Jul 1, 1995·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·N Pritchard, D Fonn
Jun 1, 1994·Optometry and Vision Science : Official Publication of the American Academy of Optometry·N A BrennanT R Golding
Jun 1, 1994·Optometry and Vision Science : Official Publication of the American Academy of Optometry·S A Little, A S Bruce
Apr 1, 1996·Optometry and Vision Science : Official Publication of the American Academy of Optometry·G Young
Jul 28, 2004·Investigative Ophthalmology & Visual Science·Jason J Nichols, P Ewen King-Smith
Feb 22, 2007·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Sin-Wan CheungVincent Ng
Apr 17, 2007·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Desmond Fonn
Sep 13, 2008·Eye & Contact Lens·Kathryn A DumbletonDesmond Fonn
Jan 27, 2009·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·James S WolffsohnAmritpreet K Basra
Aug 15, 2013·Investigative Ophthalmology & Visual Science·James S WolffsohnMark Prince
Mar 3, 2015·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·Lurdes Belda-SalmerónJames Stuart Wolffsohn

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Citations

Dec 22, 2016·Eye & Contact Lens·Fiona Stapleton, Jacqueline Tan
Mar 11, 2021·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Min FangJianhua Wang
Mar 30, 2021·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·James S WolffsohnFiona Stapleton
Aug 11, 2021·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·Carlos Carpena-TorresGonzalo Carracedo

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