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https://hdl.handle.net/1822/7830
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Campo DC | Valor | Idioma |
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dc.contributor.author | Lira, Madalena | - |
dc.contributor.author | Santos, Lívia | - |
dc.contributor.author | Azeredo, Joana | - |
dc.contributor.author | Yebra-Pimentel Vilar, Eva | - |
dc.contributor.author | Oliveira, M. Elisabete | - |
dc.date.accessioned | 2008-05-20T15:18:35Z | - |
dc.date.available | 2008-05-20T15:18:35Z | - |
dc.date.issued | 2008-04 | - |
dc.identifier.citation | Contact Lens & Anterior Eye". ISSN 1367-0484. 31:2 (Apr. 2008) 89-94. | eng |
dc.identifier.issn | 1367-0484 | eng |
dc.identifier.uri | https://hdl.handle.net/1822/7830 | - |
dc.description.abstract | Purpose: The purpose of this work was to evaluate the ability of four silicone-hydrogel contact lenses (galyfilcon A, balafilcon A, lotrafilcon A and lotrafilcon B) to retain their equilibrium water content before and after wear, through measurements of refractive index and compare with that of a conventional disposable hydrogel contact lens (etafilcon A). Methods: The refractive indices of 115 contact lenses were measured using an automated refractometer (CLR 12-70, Index Instruments, Cambridge, U.K.) before and after a schedule of daily wear by 58 patients for 30 days in the case of silicone-hydrogel lenses and 15 days for the conventional contact lenses. Results: In the silicone-hydrogel contact lenses the changes on the refractive indices were not statistically significant, however after being worn the refractive index of the conventional etalfilcon A hydrogel contact lens increased significantly ( p < 0.001). Conclusion: The results presented here show that after being worn the silicone-hydrogel contact lens, show more capacity to retain or to reach their initial equilibrium water content than conventional hydrogel contact lenses. This suggests that the silicone-hydrogel contact lenses are less susceptible to spoilation over time maintaining its biocompatibility and contributing to the clinical success of lens performance. | eng |
dc.description.sponsorship | Vision and Johnson & Johnson. | por |
dc.description.sponsorship | Bausch & Lomb | por |
dc.language.iso | eng | eng |
dc.publisher | Elsevier Ltd. | eng |
dc.rights | openAccess | eng |
dc.subject | Refractive index | eng |
dc.subject | Automated refractometer CLR 12-70 | eng |
dc.subject | Silicone-hydrogel contact lenses | eng |
dc.subject | Conventional hydrogel contact lens | eng |
dc.subject | Equilibrium water | eng |
dc.subject | Equilibrium water content | por |
dc.title | The effect of lens wear on refractive index of conventional hydrogel and silicone-hydrogel contact lenses: a comparative study | eng |
dc.type | article | por |
dc.peerreviewed | yes | eng |
sdum.number | 2 | eng |
sdum.pagination | 89–94 | eng |
sdum.publicationstatus | published | eng |
sdum.volume | 31 | eng |
oaire.citationStartPage | 89 | por |
oaire.citationEndPage | 94 | por |
oaire.citationIssue | 2 | por |
oaire.citationVolume | 31 | por |
dc.identifier.doi | 10.1016/j.clae.2007.09.001 | por |
dc.identifier.pmid | 17964212 | por |
sdum.journal | Contact Lens and Anterior Eye | por |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Lira_CLAE[1].pdf | 226,92 kB | Adobe PDF | Ver/Abrir |