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Article: A simple clinical test for perception of progressive addition lens peripheral image blue: a pilot study

TitleA simple clinical test for perception of progressive addition lens peripheral image blue: a pilot study
Authors
KeywordsProgressive addition lens
Image blur
Trial lens
Astigmatism
Polatest
Issue Date2011
PublisherSpanish Council of Optometry. The Journal's web site is located at http://www.journalofoptometry.org
Citation
Journal of Optometry, 2011, v. 4 n. 1, p. 30-34 How to Cite?
AbstractPurpose: To introduce a simple method for subjective perception of progressive addition lens (PAL) peripheral image blur (PIB). The amounts of PIB induced by traditional PAL trial lenses (plano distant PAL, TPAL) and prescription PAL (FPAL) were also evaluated. Methods: Subjects wearing the PALs adjusted their heads laterally to view the fi xation target for PIB perception. 38 subjects were randomized and recruited from the Eye’ni optical shop. Outcomes were assessed by the high-contrast visual acuity chart (LogMAR scale), and by subjectively indicating the magnitude of PIB on a scale of 0 to 10 (10 is extremely blur) using astigmatism-sensitive optotype (Polatest® , Carl Zeiss Vision, Germany). Results: Visual acuities (mean ± SD) at the central and temporal fixations were measured at 0 ± 0.03 and 0.2 ± 0.04 with FPAL, and 0 ± 0.03 and 0.1 ± 0.03 with TPAL respectively. Signifi cantly lower visual acuities were found with the temporal fi xation than with the central fi xation in both PALs (p < 0.001). And signifi cant even reduction at the temporal fi xation with FPAL than with TPAL was observed (p < 0.001). For subjective measures of PIB using astigmatism-sensitive optotype, the average score of FPAL (7.4 ± 0.8, ranged 5-9) was found statistically higher than that of TPAL (6.7 ± 0.8, ranged 4-8) (p < 0.01). Conclusions: Our proposed simple clinical method appears to facilitate PAL peripheral image blur demonstration, which may help potential PAL wearers to effectively experience the peripheral PAL image blur. Opticians may caution the potential PAL wearers that prescription PAL may induce more peripheral image blur than that with the traditional distant plano PAL trial lenses. © 2010 Spanish General Council of Optometry. Published by Elsevier España, S.L. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/133787
ISSN
2015 SCImago Journal Rankings: 0.344

 

DC FieldValueLanguage
dc.contributor.authorMok, AKH-
dc.contributor.authorChung, CST-
dc.contributor.authorKwok, TWK-
dc.date.accessioned2011-05-27T02:08:21Z-
dc.date.available2011-05-27T02:08:21Z-
dc.date.issued2011-
dc.identifier.citationJournal of Optometry, 2011, v. 4 n. 1, p. 30-34-
dc.identifier.issn1888-4296-
dc.identifier.urihttp://hdl.handle.net/10722/133787-
dc.description.abstractPurpose: To introduce a simple method for subjective perception of progressive addition lens (PAL) peripheral image blur (PIB). The amounts of PIB induced by traditional PAL trial lenses (plano distant PAL, TPAL) and prescription PAL (FPAL) were also evaluated. Methods: Subjects wearing the PALs adjusted their heads laterally to view the fi xation target for PIB perception. 38 subjects were randomized and recruited from the Eye’ni optical shop. Outcomes were assessed by the high-contrast visual acuity chart (LogMAR scale), and by subjectively indicating the magnitude of PIB on a scale of 0 to 10 (10 is extremely blur) using astigmatism-sensitive optotype (Polatest® , Carl Zeiss Vision, Germany). Results: Visual acuities (mean ± SD) at the central and temporal fixations were measured at 0 ± 0.03 and 0.2 ± 0.04 with FPAL, and 0 ± 0.03 and 0.1 ± 0.03 with TPAL respectively. Signifi cantly lower visual acuities were found with the temporal fi xation than with the central fi xation in both PALs (p < 0.001). And signifi cant even reduction at the temporal fi xation with FPAL than with TPAL was observed (p < 0.001). For subjective measures of PIB using astigmatism-sensitive optotype, the average score of FPAL (7.4 ± 0.8, ranged 5-9) was found statistically higher than that of TPAL (6.7 ± 0.8, ranged 4-8) (p < 0.01). Conclusions: Our proposed simple clinical method appears to facilitate PAL peripheral image blur demonstration, which may help potential PAL wearers to effectively experience the peripheral PAL image blur. Opticians may caution the potential PAL wearers that prescription PAL may induce more peripheral image blur than that with the traditional distant plano PAL trial lenses. © 2010 Spanish General Council of Optometry. Published by Elsevier España, S.L. All rights reserved.-
dc.languageeng-
dc.publisherSpanish Council of Optometry. The Journal's web site is located at http://www.journalofoptometry.org-
dc.relation.ispartofJournal of Optometry-
dc.subjectProgressive addition lens-
dc.subjectImage blur-
dc.subjectTrial lens-
dc.subjectAstigmatism-
dc.subjectPolatest-
dc.titleA simple clinical test for perception of progressive addition lens peripheral image blue: a pilot studyen_US
dc.typeArticleen_US
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1888-4296&volume=4&issue=1&spage=30&epage=34&date=2011&atitle=A+simple+clinical+test+for+perception+of+progressive+addition+lens+peripheral+image+blue:+a+pilot+study-
dc.identifier.emailMok, AKH: mokkwokhei@gmail.com-
dc.description.naturelink_to_OA_fulltext-
dc.identifier.hkuros185088-
dc.identifier.volume4-
dc.identifier.issue1-
dc.identifier.spage30-
dc.identifier.epage34-

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