Blinking abnormalities

Efron, Nathan

doi:10.1016/b978-0-7020-4269-0.00004-3

Cited by 3 publications

(5 citation statements)

References 38 publications

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“…A reduced blink rate is often associated with digital device use 8 , 9 , 11 , 26 and may result in blurry or degraded vision in contact lens wearers when the pre- and post-lens tear film is not sufficiently replenished by blinking. 9 , 11 , 26 A novel metric to quantify the impact of prolonged eye opening on the visual quality when looking at a computer screen has recently been developed at the Centre for Ocular Research & Education (CORE). The metric, time-to-haze (TTH), is used to measure the maximum time an individual can keep their eyes open without their vision becoming hazy.…”

Section: Methodsmentioning

confidence: 99%

Evaluating the Performance of Verofilcon A Daily Disposable Contact Lenses in a Group of Heavy Digital Device Users

Schulze,

Fadel,

Luensmann

et al. 2023

OPTH

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Purpose The purpose of this study was to evaluate the performance of verofilcon A daily disposable contact lenses (CL) in CL wearers who identified themselves as heavy digital device users. Patients and Methods This prospective, non-masked, open-label study enrolled CL wearers who reported ≥6 hours digital device use per day. Participants were dispensed with the verofilcon A study lenses for 14±2 days, to be worn for at least 5 days a week and 10 hours per day, while continuing their normal routine of digital device use. Participants rated the lens performance at the Day 14 visit using a 0–100 (with 100 being best) scale. Ratings were completed at lens insertion, after 6 hours of digital device use, just before CL removal and for overall experience. Participants also completed a 4-point (strongly agree/disagree, slightly agree/disagree) Likert scale-based questionnaire. Results Thirty-two participants were eligible and completed the study (27 females; age 25.8 ± 6.0 years, ranging from 19 to 40). Overall lens performance ratings at the Day 14 visit (mean ± standard deviation) for comfort, dryness, and clarity of vision were 91 ± 11, 88 ± 11, and 92 ± 9, respectively. Subjective ratings were stable throughout the day with no significant differences after insertion, after 6 hours of digital device use and before CL removal (all p>0.05). The majority of participants agreed that the study lenses performed well, provided good all-day comfort (28/32; p<0.01) and good all-day vision (29/32; p<0.01). Participants also agreed that after ≥6 hours of digital device use they were satisfied with CL comfort (27/32; p<0.01), vision (29/32; p<0.01) and that the lenses provided good performance (26/32; p<0.01). Conclusion Verofilcon A lenses were found to perform well, with high ratings for comfort, dryness and vision that remained high throughout the day, during extensive digital device use.

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Section: Methodsmentioning

confidence: 99%

Evaluating the Performance of Verofilcon A Daily Disposable Contact Lenses in a Group of Heavy Digital Device Users

Schulze,

Fadel,

Luensmann

et al. 2023

OPTH

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“…The thickness of the lens edge and/or the overall thickness of the lens has frequently been an object of study in the management of 3-and 9-o'clock staining. Applying the same theories as were applied to edge lift in the previous section, reduction of the lens edge thickness itself 5,8,29,55 or overall lens thickness can be expected to be beneficial in managing 3-and 9-o'clock staining. 23,24,28,48 An edge thickness between 90 and 120 μm is advised in the interview with Schnider, which in practice means that lenses would often need some form of lenticulation.…”

Section: Edge Thickness and Shapementioning

confidence: 99%

“…Appreciating the disadvantages of reflection systems, alternatives to the Placido disc based corneal topographers have been developed, [54][55][56] broadly categorized as height systems. One of the main disadvantages of reflection systems is that they measure corneal curvature and not corneal height.…”

Section: Height Systemsmentioning

confidence: 99%

“…The MST, 55 which was used for one of the studies in this thesis (part 2.1) uses Fourier profilometry. It projects a line pattern from two different directions onto…”

Section: Height Systemsmentioning

confidence: 99%

“…Based on theoretical considerations and clinical observation, alteration in eyeblink behavior during rigid gas permeable lens wear can be a possible risk factor for the development of 3-and 9-o'clock staining. 59,166,167 The assumption is made that discomfort inhibits eyeblinking, which stimulates tear evaporation, and this in turn can stimulate the development of 3-and 9-o'clock staining, 168,80 but no publications studying this potential relationship are available. Eyeblink behavior in rigid gas permeable contact lens wear will be covered and studied in detail in part 5.2 of this thesis.…”

Section: Eyeblinkingmentioning

confidence: 99%

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Corneal desiccation in rigid gas permeable contact lens wear : time to deal with 3- and 9-o clock staining

Worp¹

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