摘要
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 examin ation. 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 hund red fifty-seven right eyes were available for refraction analysis. In the 50-t o 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 0.34D, respectively, during the 5 years . There was a 0.02-D myopic shift for those 70 years of age and older at baseli ne during the same period. Considering all right eyes, there was a hyperopic shi ft of +0.29 D over the 5 years, whereas eyes with nuclear lens opacification gr ade 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 dat a on axial length are available from the followup study only. The mean axial len gth for those 50 to 59 years of age at baseline was 23.56mm (standard deviation [SD], 1.08 mm), as compared with 23.23 mm (SD, 1.27 mm) for those 70 years of ag e and older at baseline (P< 0.04). Conclusions: We found a hyperopic shift for t hose younger than 70 years of age at baseline, although eyes with nuclear opacif ication grade of II or more at baseline were associated with a myopic shift. The re was also an age-related shift against the rule for the axis of astigmatism d uring the 5-year period. Our results may be useful for predicting long-term ou tcome of refractive surgery.
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 examin ation. 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 hund red fifty-seven right eyes were available for refraction analysis. In the 50-t o 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 0.34D, respectively, during the 5 years . There was a 0.02-D myopic shift for those 70 years of age and older at baseli ne during the same period. Considering all right eyes, there was a hyperopic shi ft of +0.29 D over the 5 years, whereas eyes with nuclear lens opacification gr ade 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 dat a on axial length are available from the followup study only. The mean axial len gth for those 50 to 59 years of age at baseline was 23.56mm (standard deviation [SD], 1.08 mm), as compared with 23.23 mm (SD, 1.27 mm) for those 70 years of ag e and older at baseline (P< 0.04). Conclusions: We found a hyperopic shift for t hose younger than 70 years of age at baseline, although eyes with nuclear opacif ication grade of II or more at baseline were associated with a myopic shift. The re was also an age-related shift against the rule for the axis of astigmatism d uring the 5-year period. Our results may be useful for predicting long-term ou tcome of refractive surgery.
出处
《世界核心医学期刊文摘（眼科学分册）》
2005年第11期53-54,共2页
Digest of the World Core Medical Journals:Ophthalmology
