Relationship between lenticular power and refractive error in children with hyperopia
Authors Tomomatsu T, Kono S, Arimura S, Tomomatsu Y, Matsumura T, Takihara Y, Inatani M, Takamura Y
Received 24 December 2012
Accepted for publication 31 January 2013
Published 24 March 2013 Volume 2013:7 Pages 601—606
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 3
Takeshi Tomomatsu, Shinjiro Kono, Shogo Arimura, Yoko Tomomatsu, Takehiro Matsumura, Yuji Takihara, Masaru Inatani, Yoshihiro Takamura
Department of Ophthalmology, Faculty of Medical Sciences, University of Fukui, Fukuiken, Japan
Objectives: To evaluate the contribution of axial length, and lenticular and corneal power to the spherical equivalent refractive error in children with hyperopia between 3 and 13 years of age, using noncontact optical biometry.
Methods: There were 62 children between 3 and 13 years of age with hyperopia (+2 diopters [D] or more) who underwent automated refraction measurement with cycloplegia, to measure spherical equivalent refractive error and corneal power. Axial length was measured using an optic biometer that does not require contact with the cornea. The refractive power of the lens was calculated using the Sanders-Retzlaff-Kraff formula. Single regression analysis was used to evaluate the correlation among the optical parameters.
Results: There was a significant positive correlation between age and axial length (P = 0.0014); however, the degree of hyperopia did not decrease with aging (P = 0.59). There was a significant negative correlation between age and the refractive power of the lens (P = 0.0001) but not that of the cornea (P = 0.43). A significant negative correlation was observed between the degree of hyperopia and lenticular power (P < 0.0001).
Conclusion: Although this study is small scale and cross sectional, the analysis, using noncontact biometry, showed that lenticular power was negatively correlated with refractive error and age, indicating that lower lens power may contribute to the degree of hyperopia.
Keywords: emmetropization, axial length
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