Oxygen permeability of the pigmented material used in cosmetic daily disposable contact lenses

Stephen Galas, Lenora L Copper Johnson & Johnson Vision Care Inc., Jacksonville, FL, USA Purpose: To evaluate the individual contributions of pigment colorant and packing solution containing polyvinyl pyrrolidone (PVP) on the oxygen permeability (Dk) of a cosmetic printed etafilcon A daily...

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Autores principales:	Galas S, Copper LL
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2016
Materias:	etafilcon A pigmented contact lenses cornea oxygen transmission Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/63b6a93631bc41cf9ffb495330b8b650
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spelling	oai:doaj.org-article:63b6a93631bc41cf9ffb495330b8b6502021-12-02T00:37:56ZOxygen permeability of the pigmented material used in cosmetic daily disposable contact lenses1177-5483https://doaj.org/article/63b6a93631bc41cf9ffb495330b8b6502016-12-01T00:00:00Zhttps://www.dovepress.com/oxygen-permeability-of-the-pigmented-material-used-in-cosmetic-daily-d-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Stephen Galas, Lenora L Copper Johnson & Johnson Vision Care Inc., Jacksonville, FL, USA Purpose: To evaluate the individual contributions of pigment colorant and packing solution containing polyvinyl pyrrolidone (PVP) on the oxygen permeability (Dk) of a cosmetic printed etafilcon A daily disposable contact lens packaged with PVP. Method: The oxygen transport of a contact lens is evaluated through the central optical zone of the lens. Cosmetic printed contact lenses contain pigment colorant in the periphery or mid-periphery of the lens. Therefore, to assess the impact of cosmetic print on oxygen permeability, special lenses need to be produced that contain the colorant within the central optical zone. This technique was used to obtain multiple measurements of nonedge-corrected Dk/t of both the center pigmented lens and its nonpigmented equivalent, using a polarographic measurement described in International Organization for Standardization (ISO) 18369-4:2006(E), and the Dk derived for each measurement is corrected for edge effect. In addition, the edge-corrected Dk values of lenses made from the same monomer batch were measured. The lenses were packaged and autoclaved with and without proprietary technology which embeds PVP in the contact lens during autoclaving. The resulting Dk value of the printed lens material was then used with thickness data to generate true Dk/t profiles for a given lens power. Results: The edge-corrected Dk of the printed etafilcon A lens with offset pigment colorant was measured to be 19.7×10-11 (cm2/s) (mL O2/mL·mmHg) at 35°C. This was within ±20% tolerance range as specified in ISO 18369-2:2012(E) for the edge-corrected Dk of the nonpigmented etafilcon A control lens evaluated during the same session, 19.5×10-11 (cm2/s) (mL O2/mL·mmHg). The edge-corrected Dk values of the lenses packaged with PVP (mean 20.1, standard deviation [SD] 0.3) were also within the ±20% tolerance range compared to those packaged without PVP (mean 20.0, SD 0.3). Conclusion: The pigment colorant and PVP embedded in the contact lens during autoclaving were not found to influence the oxygen permeability of the etafilcon A material. Keywords: oxygen, oxygen permeability, Dk, hydrogel contact lenses, cosmetic contact lensesGalas SCopper LLDove Medical Pressarticleetafilcon Apigmented contact lensescorneaoxygen transmissionOphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 10, Pp 2469-2474 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	etafilcon A pigmented contact lenses cornea oxygen transmission Ophthalmology RE1-994
spellingShingle	etafilcon A pigmented contact lenses cornea oxygen transmission Ophthalmology RE1-994 Galas S Copper LL Oxygen permeability of the pigmented material used in cosmetic daily disposable contact lenses
description	Stephen Galas, Lenora L Copper Johnson & Johnson Vision Care Inc., Jacksonville, FL, USA Purpose: To evaluate the individual contributions of pigment colorant and packing solution containing polyvinyl pyrrolidone (PVP) on the oxygen permeability (Dk) of a cosmetic printed etafilcon A daily disposable contact lens packaged with PVP. Method: The oxygen transport of a contact lens is evaluated through the central optical zone of the lens. Cosmetic printed contact lenses contain pigment colorant in the periphery or mid-periphery of the lens. Therefore, to assess the impact of cosmetic print on oxygen permeability, special lenses need to be produced that contain the colorant within the central optical zone. This technique was used to obtain multiple measurements of nonedge-corrected Dk/t of both the center pigmented lens and its nonpigmented equivalent, using a polarographic measurement described in International Organization for Standardization (ISO) 18369-4:2006(E), and the Dk derived for each measurement is corrected for edge effect. In addition, the edge-corrected Dk values of lenses made from the same monomer batch were measured. The lenses were packaged and autoclaved with and without proprietary technology which embeds PVP in the contact lens during autoclaving. The resulting Dk value of the printed lens material was then used with thickness data to generate true Dk/t profiles for a given lens power. Results: The edge-corrected Dk of the printed etafilcon A lens with offset pigment colorant was measured to be 19.7×10-11 (cm2/s) (mL O2/mL·mmHg) at 35°C. This was within ±20% tolerance range as specified in ISO 18369-2:2012(E) for the edge-corrected Dk of the nonpigmented etafilcon A control lens evaluated during the same session, 19.5×10-11 (cm2/s) (mL O2/mL·mmHg). The edge-corrected Dk values of the lenses packaged with PVP (mean 20.1, standard deviation [SD] 0.3) were also within the ±20% tolerance range compared to those packaged without PVP (mean 20.0, SD 0.3). Conclusion: The pigment colorant and PVP embedded in the contact lens during autoclaving were not found to influence the oxygen permeability of the etafilcon A material. Keywords: oxygen, oxygen permeability, Dk, hydrogel contact lenses, cosmetic contact lenses
format	article
author	Galas S Copper LL
author_facet	Galas S Copper LL
author_sort	Galas S
title	Oxygen permeability of the pigmented material used in cosmetic daily disposable contact lenses
title_short	Oxygen permeability of the pigmented material used in cosmetic daily disposable contact lenses
title_full	Oxygen permeability of the pigmented material used in cosmetic daily disposable contact lenses
title_fullStr	Oxygen permeability of the pigmented material used in cosmetic daily disposable contact lenses
title_full_unstemmed	Oxygen permeability of the pigmented material used in cosmetic daily disposable contact lenses
title_sort	oxygen permeability of the pigmented material used in cosmetic daily disposable contact lenses
publisher	Dove Medical Press
publishDate	2016
url	https://doaj.org/article/63b6a93631bc41cf9ffb495330b8b650
work_keys_str_mv	AT galass oxygenpermeabilityofthepigmentedmaterialusedincosmeticdailydisposablecontactlenses AT copperll oxygenpermeabilityofthepigmentedmaterialusedincosmeticdailydisposablecontactlenses
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Oxygen permeability of the pigmented material used in cosmetic daily disposable contact lenses

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