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. 2022 Jan;66(1):74-80.
doi: 10.1007/s10384-021-00880-2. Epub 2021 Dec 2.

Peripheral refraction in Japanese schoolchildren with low to moderate myopia

Takashi Furuse  1   2 , Satoshi Hasebe  3   4 , Tomoki Tokutake  4
Affiliations

Peripheral refraction in Japanese schoolchildren with low to moderate myopia

Takashi Furuse et al. Jpn J Ophthalmol. 2022 Jan.

Abstract

Purpose: To report the profile of peripheral refraction in Japanese children with mild to moderate myopia and compare it with reported data from other countries.

Study design: Cross-sectional study.

Methods: Subjects were 76 Japanese children with myopia (mean± SD [range] spherical equivalent, -3.04±0.98 [-0.50 to -4.50] D; mean age, 10.0±1.5 [6-12] years). We performed cycloplegic refraction using an open-field autorefractor FR-5000 (Grand Seiko) while the subject looked at external fixation targets located at 0, ±15, ±30 degrees from the center along the horizontal meridian. Only the right eye data were analyzed after converting the readings to the power vector of M (spherical equivalent), J180, and J45.

Results: The profile showed a clear hyperopic shift of M from the fovea to the peripheral retina, although a wide inter-subject variation existed. At the gaze positions of ±30 degrees, the mean relative M were +1.16±0.89 D and +1.64±1.02 D (nasal and temporal retina, respectively). Those for J180 were -0.94±0.30 D and -0.70±0.30 D (nasal and temporal retina, respectively). The mean J45 remained small (≦ 0.17 D) within this range of eccentricity. There was no correlation between the relative M at the gaze position of -30 degrees and on-axis refraction, axial length, or children's age (p > 0.05).

Conclusions: The profile of peripheral refraction was similar to that reported in children with moderate to high myopia in other East Asian countries. In this cohort, we did not find evidence supporting a hypothesis that greater myopia and longer axial length are associated with a greater peripheral hyperopic shift of the refraction.

Keywords: Japanese children; Myopia progression; Peripheral refraction.

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