The Aetiology of Myopia as Considered from the Differences in the Refractive Components of the Right and Left Eyes

  • J. Otsuka
  • T. Sugata
  • M. Araki
Part of the Documenta Ophthalmologica Proceedings Series book series (DOPS, volume 28)

Abstract

J. Otsuka (1951) and T. Sugata (1958) measured the axial length of the eye with X-ray-vision and calculated the refractive power of the crystalline lens from the axial length and the degree of ametropia of the eye. M. Araki (1962) made ultrasonic measurements of the axial length, anterior chamber depth and lens thickness and calculated the refractive power of the crystalline lens using these values and the degree of ametropia of the eye. The authors discovered in 1979 that most of the age and sex differences in refraction can be eliminated by determining the differences in the mean values of the refractive components of the two eyes in each patient, which were classified into the eye with the higher degree of ametropia and the eye with the lower degree (Table 1). They then applied this method of calculation to their-subject groups composed of bilateral emmetropes, isometropes and anisometropes, and obtained the following results:

Table 1. The statistical significance of the differences between the refractive components of the eyes with higher refraction and those of the corresponding other eyes with lower refraction in 42 low and high anisometropic subjects (Calculated from M. Araki’s data).

Keywords

Refraction Atropine Hyoscine Myopia Aniso 

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References

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Copyright information

© Dr W. Junk Publishers, The Hague 1981

Authors and Affiliations

  • J. Otsuka
    • 1
  • T. Sugata
    • 1
    • 2
  • M. Araki
    • 1
  1. 1.TokyoJapan
  2. 2.Department of OphthalmologyTokyo Medical and Dental University School of MedicineTokyoJapan

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