July 2018
Volume 59, Issue 9
Open Access
ARVO Annual Meeting Abstract  |   July 2018
A ten-year large-scale follow-up study into the number of prescriptions of single vision and bifocal contact lenses in Japan. - The result of analysis of approximately 590,000 eyes of Japanese patients. -
Author Affiliations & Notes
  • Eiichi Okada
    Okada Eye Clinic, Yokohama, KANAGAWA, Japan
  • Nobuhisa Mizuki
    Department of Ophthalmology, Yokohama City University School of Medicine, Yokohama, Kanagawa, Japan
  • Masaki Takeuchi
    Department of Ophthalmology, Yokohama City University School of Medicine, Yokohama, Kanagawa, Japan
  • Takahiro Yamane
    Department of Ophthalmology, Yokohama City University School of Medicine, Yokohama, Kanagawa, Japan
  • Yuki Mizuki
    Department of Ophthalmology, Saiseikai Yokohamashi Nanbu Hospital, Yokohama, Kanagawa, Japan
  • Masao Yoshida
    Department of Public Health, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
  • Footnotes
    Commercial Relationships   Eiichi Okada, None; Nobuhisa Mizuki, None; Masaki Takeuchi, None; Takahiro Yamane, None; Yuki Mizuki, None; Masao Yoshida, None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science July 2018, Vol.59, 1784. doi:
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      Eiichi Okada, Nobuhisa Mizuki, Masaki Takeuchi, Takahiro Yamane, Yuki Mizuki, Masao Yoshida; A ten-year large-scale follow-up study into the number of prescriptions of single vision and bifocal contact lenses in Japan. - The result of analysis of approximately 590,000 eyes of Japanese patients. -. Invest. Ophthalmol. Vis. Sci. 2018;59(9):1784.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose : A ten-year large-scale follow-up study was undertaken to analyze approximately 590,000 eyes of Japanese subjects prescribed contact lenses (CL) due to ametropia and accommodative dysfunction by CL type.

Methods : The subject of this study is the 590,783 eyes (single vision: 581,539 eyes, bifocal vision: 9,244 eyes) of Japanese subjects in the 10 to 98 year age range, prescribed CL at the Okada Eye Clinic to correct ametropia and accommodative dysfunction. Data was collected for the years 2006, 2011 and 2016.

Results : Following longitudinally analysis of CL prescriptions in 2006, 2011 and 2016 by CL type, 1DaySCL prescriptions were found to have significantly increased (p for trend〈0.001) (36.63%, 42.65%, and 49.30% on each year). On the other hand, prescriptions of 2WeekSCL declined (48.96%, 45.12%, and 40.29% on each year). Prescriptions of HCL were relatively low, maintaining about 5% of total prescriptions.
Furthermore, by longitudinally analyzing the percentage of bifocal lenses prescriptions, 2WeekSCL were found to be the most popular CL in every year. However, prescriptions significantly decreased over time (p for trend〈0.001) (81.57%, 70.55%, 50.76% on each year). In contrast, prescriptions of 1DaySCL showed a significant upward trend (p for trend〈0.001) (0%, 16.68%, 38.90% on each year). Despite this increase, total number of prescriptions of 1DaySCL was still lower than 2Week SCL. HCL maintained approximately 10% of total prescriptions, decreasing over time (p for trend〈0.005).
Finally, when analyzing the results by sex, there were no big differences in both single vision and bifocal vision prescriptions. However, with single vision CL, more HCL were prescribed to women than men. Women were also prescribed bifocal lenses 5 times more frequently than men.

Conclusions : Longitudinally analysis of CL prescriptions by CL type showed that, with single vision lenses, prescription of 1DaySCL has increased significantly over the past 10 years. As a result, demand for 1DaySCL is predicted to increase in the future. Additionally, in the bifocal CL group, prescription of 1DaySCL has also increased over time. However, they still account for only a small proportion of total CL prescriptions. Further improvements of the bifocal vision CL are recommended.

This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.

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