Characterizing the surface properties of daily disposable contact lens materials

Subbaraman, Lakshman N.; Tucker, Bob; Leveillee, Ethan; Bauman, Erich

doi:10.1016/j.clae.2020.12.017

Cited by 5 publications

(7 citation statements)

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“…24 However, concerning the tear film stability, when the prelens tear film retracts (dewetting), these differences between different materials resulted less pronounced, as observed in vitro by analyzing the receding CA 24,25 and by in vitro techniques inspired by in vivo processes. 26,27 This could be ascribed to the rapid dehydration of the outer layer, which causes WG-CL properties to quickly transform into those of a low EWC SHy-CL, showing low dewetting time. Nonetheless, if the field is extended to other WG-CLs, the results are controversial: for example, some authors 27 reported a dewetting time four times longer for verofilcon A (SHy) than for other CLs.…”

Section: Discussionmentioning

confidence: 99%

“…26,27 This could be ascribed to the rapid dehydration of the outer layer, which causes WG-CL properties to quickly transform into those of a low EWC SHy-CL, showing low dewetting time. Nonetheless, if the field is extended to other WG-CLs, the results are controversial: for example, some authors 27 reported a dewetting time four times longer for verofilcon A (SHy) than for other CLs.…”

Section: Discussionmentioning

confidence: 99%

“…On the contrary, Subbaraman et al 27 found that the dewetting time of WG-CLs was more than four times longer than etafilcon A (Hy), somofilcon A (SHy), and stenfilcon A (SHy) CLs. It must be noted that Havuz and Gokmen 26 and Walther et al 28 investigated the dewetting properties of delefilcon A (SHy), whereas Subbaraman et al 27 analyzed verofilcon A CLs (SHy).…”

Section: Surface Wetting and Dewettingmentioning

confidence: 97%

“…For example, Havuz and Gokmen 26 used a 15-mm chrome-coated artificial cornea model and captured 24 frames per second with a videokeratoscope device to evaluate surface dewetting. Subbaraman et al 27 recorded videos of the fluid draining from the surface of a CL submerged in a saline solution and then raised out of the fluid at a controlled rate. The results are variable.…”

Section: Surface Wetting and Dewettingmentioning

confidence: 99%

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Physical Properties and Interaction With the Ocular Surface of Water-Gradient Contact Lenses

Ponzini

Recchioni²,

Cheloni³

et al. 2023

Eye &Amp; Contact Lens: Science &Amp; Clinical Practice

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Since the introduction of silicone hydrogel contact lenses, many silicone-hydrogel materials have been produced, including water-gradient contact lenses with a silicone hydrogel core and a thin hydrogel outer layer (e.g., delefilcon A, verofilcon A, and lehfilcon A). Their properties have been investigated in various studies assessing both the chemical-physical characteristics and the comfort, but the overall picture is not always consistent. In this study, water-gradient technology is reviewed by looking at basic physical properties both in vitro and in vivo and at the interaction with the human ocular surface. Surface and bulk dehydration, surface wetting and dewetting, shear stress, interaction with tear components and with other environmental compounds, and comfort are discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Surface Wetting and Dewettingmentioning

confidence: 97%

Section: Surface Wetting and Dewettingmentioning

confidence: 99%

See 2 more Smart Citations

Physical Properties and Interaction With the Ocular Surface of Water-Gradient Contact Lenses

Ponzini

Recchioni²,

Cheloni³

et al. 2023

Eye &Amp; Contact Lens: Science &Amp; Clinical Practice

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“…8 One advancement in lens technology has been the creation of a new daily disposable silicone hydrogel lens material with water surface technology. The spherical lens design has good clinical acceptance, 9 fits well, 10 provides a more stable tear film compared to other lenses, 11,12 and has good comfort and vision. [13][14][15] The spherical lens design has recently been modified to incorporate toric prescriptions.…”

Section: Introductionmentioning

confidence: 99%

Short-Term Fit Assessment of a Novel Daily Disposable, Toric, Silicone Hydrogel Contact Lens

Gustafson¹,

Whaley²,

Giedd³

et al. 2022

OPTH

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The development of new contact lens materials and designs are necessary to minimise patient dropout. A lens material with water surface technology was recently developed to incorporate toric design. The on-eye stability of a toric contact lens is critical to a successful toric lens fitting. In an effort to establish if the new daily disposable verofilcon A toric silicone hydrogel lens provides fast stability for ease of fit, this study assessed the initial and short-term on-eye stability of this new lens. Patients and Methods: Habitual full-time wearers of soft contact lenses, aged 18 or over, were enrolled and fit with the verofilcon A toric lens. Study endpoints included lens settling time, axis orientation at specific time-points within 10 minutes after insertion, lens oscillation with blink, lens movement and centration, and scribe mark visibility. Results: Thirty-nine subjects completed the study; 67% were female and mean age was 34.1 ± 10.8 years (range 18 to 61). The majority of verofilcon A toric lenses (98.7%) settled on average within 60 seconds. Average lens orientation was 3° from six o'clock position within two minutes of insertion. The lenses showed minimal oscillation with blink; 98.7% of the eyes demonstrated ≤5° oscillation with blink. All lenses showed optimal/acceptable lens movement and centration and the scribe mark was reported as easily visible in 96% of eyes. Practitioners reported a 99% first lens fit success rate. Conclusion:The novel verofilcon A toric lens was highly successful with the first lens, had excellent on-eye stability and good fit characteristics. These qualities make this new lens a good option for lens wearers. Furthermore, it fulfills the needs of practitioners who want a toric lens that is easy and predictable to fit.

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Study of silicone hydrogel contact lenses’ surface reflection characteristics using confocal microscopy

Suliński

Nowak

Szymański

et al. 2023

Journal of Biomaterials Science, Polymer Edition

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Characterizing the surface properties of daily disposable contact lens materials

Cited by 5 publications

References 0 publications

Physical Properties and Interaction With the Ocular Surface of Water-Gradient Contact Lenses

Physical Properties and Interaction With the Ocular Surface of Water-Gradient Contact Lenses

Short-Term Fit Assessment of a Novel Daily Disposable, Toric, Silicone Hydrogel Contact Lens

Study of silicone hydrogel contact lenses’ surface reflection characteristics using confocal microscopy

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