2.50
Hdl Handle:
http://hdl.handle.net/2336/65094
Title:
Five-year refractive changes in an adult population: Reykjavik Eye Study
Authors:
Gudmundsdottir, Elinborg; Arnarsson, Arsaell; Jonasson, Fridbert
Citation:
Ophthalmology. 2005, 112(4):672-7
Issue Date:
1-Apr-2005
Abstract:
PURPOSE: To study refractive changes over the course of 5 years in citizens of Reykjavik 50 years and older at baseline. METHODS: The cohort was a population-based random sample of citizens 50 years and older. Eight hundred forty-six of the 958 survivors (88.2%) underwent a 5-year follow-up examination. Refraction and keratometry were performed using a Nidek (Gamagori, Japan) ARK 900 autorefractor keratometer. Typing and grading of lens opacification was carried out using Scheimpflug slit-lamp and retroilluminated images (Nidek EAS 1000), and axial length was measured by Nidek Echoscan 800. RESULTS: Seven hundred fifty-seven right eyes were available for refraction analysis. In the 50- to 59-year age group and the 60- to 69-year age group at baseline, there was a hyperopic shift of 0.41 diopters (D) and 0.34 D, respectively, during the 5 years. There was a 0.02-D myopic shift for those 70 years of age and older at baseline during the same period. Considering all right eyes, there was a hyperopic shift of +0.29 D over the 5 years, whereas eyes with nuclear lens opacification grade II or more at baseline had a mean myopic shift of -0.65 D. There was a mean change of 0.13 D in the astigmatism against the rule during the 5 years. The data on axial length are available from the follow-up study only. The mean axial length for those 50 to 59 years of age at baseline was 23.56 mm (standard deviation [SD], 1.08 mm), as compared with 23.23 mm (SD, 1.27 mm) for those 70 years of age and older at baseline (P<0.04). CONCLUSIONS: We found a hyperopic shift for those younger than 70 years of age at baseline, although eyes with nuclear opacification grade of II or more at baseline were associated with a myopic shift. There was also an age-related shift against the rule for the axis of astigmatism during the 5-year period. Our results may be useful for predicting long-term outcome of refractive surgery.
Description:
To access publisher full text version of this article. Please click on the hyperlink in Additional Links field
Additional Links:
http://www.sciencedirect.com/science/article/B6VT2-4FJW23N-2/2/cc3481495bbc9becfe61c51754c64977

Full metadata record

DC FieldValue Language
dc.contributor.authorGudmundsdottir, Elinborg-
dc.contributor.authorArnarsson, Arsaell-
dc.contributor.authorJonasson, Fridbert-
dc.date.accessioned2009-04-16T11:37:29Z-
dc.date.available2009-04-16T11:37:29Z-
dc.date.issued2005-04-01-
dc.date.submitted2009-04-16-
dc.identifier.citationOphthalmology. 2005, 112(4):672-7en
dc.identifier.issn1549-4713-
dc.identifier.pmid15808261-
dc.identifier.doi10.1016/j.ophtha.2004.11.039-
dc.identifier.urihttp://hdl.handle.net/2336/65094-
dc.descriptionTo access publisher full text version of this article. Please click on the hyperlink in Additional Links fielden
dc.description.abstractPURPOSE: To study refractive changes over the course of 5 years in citizens of Reykjavik 50 years and older at baseline. METHODS: The cohort was a population-based random sample of citizens 50 years and older. Eight hundred forty-six of the 958 survivors (88.2%) underwent a 5-year follow-up examination. Refraction and keratometry were performed using a Nidek (Gamagori, Japan) ARK 900 autorefractor keratometer. Typing and grading of lens opacification was carried out using Scheimpflug slit-lamp and retroilluminated images (Nidek EAS 1000), and axial length was measured by Nidek Echoscan 800. RESULTS: Seven hundred fifty-seven right eyes were available for refraction analysis. In the 50- to 59-year age group and the 60- to 69-year age group at baseline, there was a hyperopic shift of 0.41 diopters (D) and 0.34 D, respectively, during the 5 years. There was a 0.02-D myopic shift for those 70 years of age and older at baseline during the same period. Considering all right eyes, there was a hyperopic shift of +0.29 D over the 5 years, whereas eyes with nuclear lens opacification grade II or more at baseline had a mean myopic shift of -0.65 D. There was a mean change of 0.13 D in the astigmatism against the rule during the 5 years. The data on axial length are available from the follow-up study only. The mean axial length for those 50 to 59 years of age at baseline was 23.56 mm (standard deviation [SD], 1.08 mm), as compared with 23.23 mm (SD, 1.27 mm) for those 70 years of age and older at baseline (P<0.04). CONCLUSIONS: We found a hyperopic shift for those younger than 70 years of age at baseline, although eyes with nuclear opacification grade of II or more at baseline were associated with a myopic shift. There was also an age-related shift against the rule for the axis of astigmatism during the 5-year period. Our results may be useful for predicting long-term outcome of refractive surgery.en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.urlhttp://www.sciencedirect.com/science/article/B6VT2-4FJW23N-2/2/cc3481495bbc9becfe61c51754c64977en
dc.subject.meshAge Distributionen
dc.subject.meshAgeden
dc.subject.meshAged, 80 and overen
dc.subject.meshAstigmatismen
dc.subject.meshCohort Studiesen
dc.subject.meshCorneaen
dc.subject.meshFemaleen
dc.subject.meshHumansen
dc.subject.meshHyperopiaen
dc.subject.meshIcelanden
dc.subject.meshLongitudinal Studiesen
dc.subject.meshMaleen
dc.subject.meshMiddle Ageden
dc.subject.meshMyopiaen
dc.subject.meshRefraction, Ocularen
dc.subject.meshSex Distributionen
dc.titleFive-year refractive changes in an adult population: Reykjavik Eye Studyen
dc.typeArticleen
dc.contributor.departmentDepartment of Ophthalmology, University of Iceland, Reykjavik, Iceland.en
dc.identifier.journalOphthalmologyen
All Items in Hirsla are protected by copyright, with all rights reserved, unless otherwise indicated.