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Effects of Pigment Location in Tinted Contact Lenses on the Ocular Surface

Authors
 Jung, Ji Won  ;  Han, Sun Hyup  ;  Park, Si Yoon  ;  Kim, Eung Kweon  ;  Seo, Kyoung Yul  ;  Kim, Tae-im 
Citation
 Optometry and Vision Science, Vol.93(8) : 997-1003, 2016 
Journal Title
 Optometry and Vision Science 
ISSN
 1040-5488 
Issue Date
2016
MeSH
Adult ; Coloring Agents/analysis* ; Conjunctiva/anatomy & histology* ; Contact Lenses, Hydrophilic* ; Cornea/anatomy & histology* ; Equipment Design ; Female ; Humans ; Male ; Materials Testing/methods* ; Prospective Studies ; Surface Properties
Keywords
decorative tinted soft contact lens ; tear cytokines ; pigment location ; surface roughness ; contact lens comfort
Abstract
PURPOSE: To evaluate the effects of the location of pigments in decorative tinted soft contact lenses on the ocular surface. METHODS: Thirty test subjects were enrolled in this study. All subjects wore the following types of contact lenses, classified according to the location of the pigment layer, in one eye in three different testing sessions: conventional clear lenses, tinted lenses with a pigment layer embedded in the lens matrix, and tinted lenses with an exposed pigment layer on the surface. Tear samples were collected, the ocular surface status was evaluated, and subjective symptoms were surveyed after lens wear for 8 hours. RESULTS: The tinted lenses with surface pigments resulted in a greater increase in epidermal growth factor and interleukin-8 levels compared with the clear lenses and tinted lenses with embedded pigments (p < 0.050). Ocular surface parameters and subjective symptom scores were significantly different among three lens types (p < 0.050), with the clear lenses showing superior results compared with the two tinted lenses (p < 0.050). The tinted lenses with exposed pigments resulted in a greater degree of conjunctival redness and ocular surface staining and poorer symptom scores compared with the tinted lens with embedded pigments (p < 0.050). CONCLUSIONS: Our results suggest that the presence of surface pigments in tinted contact lenses increases ocular inflammation and results in a poorer ocular surface status and greater discomfort compared with clear lenses and tinted lenses with an embedded pigment layer.
Full Text
http://ovidsp.ovid.com/ovidweb.cgi?T=JS&CSC=Y&NEWS=N&PAGE=fulltext&AN=00006324-201608000-00027&LSLINK=80&D=ovft
DOI
10.1097/OPX.0000000000000880
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Ophthalmology (안과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Eung Kweon(김응권) ORCID logo https://orcid.org/0000-0002-1453-8042
Kim, Tae Im(김태임) ORCID logo https://orcid.org/0000-0001-6414-3842
Park, Si Yoon(박시윤)
Seo, Kyuong Yul(서경률) ORCID logo https://orcid.org/0000-0002-9855-1980
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/151816
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