Objective analysis of contact lens fit

Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association
Lurdes Belda-SalmerónJames S Wolffsohn

Abstract

To assess the validity and repeatability of objective compared to subjective contact lens fit analysis. Thirty-five subjects (aged 22.0±3.0 years) wore two different soft contact lens designs. Four lens fit variables: centration, horizontal lag, post-blink movement in up-gaze and push-up recovery speed were assessed subjectively (four observers) and objectively from slit-lamp biomicroscopy captured images and video. The analysis was repeated a week later. The average of the four experienced observers was compared to objective measures, but centration, movement on blink, lag and push-up recovery speed all varied significantly between them (p<0.001). Horizontal lens centration was on average close to central as assessed both objectively and subjectively (p>0.05). The 95% confidence interval of subjective repeatability was better than objective assessment (±0.128 mm versus ±0.168 mm, p=0.417), but utilised only 78% of the objective range. Vertical centration assessed objectively showed a slight inferior decentration (0.371±0.381 mm) with good inter- and intrasession repeatability (p>0.05). Movement-on-blink was lower estimated subjectively than measured objectively (0.269±0.179 mm versus 0.352±0.355 mm; p=0.035), but had better re...Continue Reading

References

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Citations

Jan 19, 2016·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·Nikolay BoychevJames S Wolffsohn
Nov 18, 2019·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Pete S Kollbaum, Arthur Bradley
Dec 22, 2017·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Essam S AlmutlebShirin E Hassan
Apr 28, 2020·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·Manbir NagraJames S Wolffsohn
Mar 30, 2021·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·Kathryn RichdalePhilip B Morgan
Mar 30, 2021·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·James S WolffsohnFiona Stapleton

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