近視、強度近視では緑内障手術を要するリスクが最大約4倍に上昇~1400万人追跡調査で判明~

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2026-01-08 京都大学

日本人に多い近視が、将来的に緑内障、特に手術を要する重症緑内障のリスクを大幅に高めることが、約1,420万人を対象とした大規模追跡研究で明らかになった。医学研究科の三宅正裕特定講師らの研究グループは、厚生労働省の全国診療報酬データベース(NDB)を用い、40歳以上で屈折検査を受けた人を約7.5年間追跡した。その結果、強度近視の人は非近視の人に比べ、緑内障の新規発症リスクが約2.7倍、さらに濾過手術を要するほど進行した緑内障のリスクは最大約4倍に達することが判明した。本研究は、特に強度近視の人に対して、緑内障の早期発見・早期治療が失明予防に極めて重要であることを強く示唆する。成果は国際誌Ophthalmologyに掲載された。

近視、強度近視では緑内障手術を要するリスクが最大約4倍に上昇~1400万人追跡調査で判明~
追跡期間を通じて、濾過手術に至る割合は非近視群よりも近視群で高く、特に強度近視群でより高い傾向が認められた。40~64歳(パネルA:近視あり vs 近視なし、パネルC:強度近視あり vs 近視なし)と65歳以上(パネルB、D)に分けて示してある。

<関連情報>

近視・強度近視眼における緑内障発症および緑内障手術リスク:全国コホート研究 Risk of Glaucoma and Undergoing Glaucoma Surgery in Myopic and Highly Myopic Eyes: A Nationwide Population-Based Cohort Study

Masahiro Akada, M.D. ∙ Masayuki Hata, M.D., Ph.D. ∙ Takuro Kamei, M.D. ∙ … ∙ Hiroshi Tamura, M.D., Ph.D., ScM, ∙ Akitaka Tsujikawa, M.D., Ph.D. ∙ Masahiro Miyake, M.D., Ph.D., M.P.H.
Ophthalmology  Published:January 5, 2026
DOI:https://doi.org/10.1016/j.ophtha.2025.12.025

Abstract

Purpose

To evaluate the risk of glaucoma development and the necessity for glaucoma surgery among patients with myopia and high myopia.

Design

A longitudinal, nationwide, population-based cohort study.

Participants

A total of 14,204,347 phakic individuals aged ≥40 years, with claims indicating refraction testing between September 2014 and August 2015, were followed from September 2015 to March 2023.

Methods

Using validated algorithms, participants were classified into three groups based on refractive error status—non-myopia, myopia, and high myopia (spherical equivalent ≤ –6.0 D). The high myopia group was considered a subset of the myopia group. The risk of developing glaucoma and the requirement for glaucoma surgery over 7.5 years were assessed through Cox proportional hazards regression, adjusting for potential confounders.

Main Outcome Measures

The primary outcomes were the development of glaucoma and the requirement for glaucoma surgery.

Results

Among the 14,204,347 participants, 7,478,999 were identified as having any degree of myopia, including 373,232 patients who met the criteria for high myopia. The mean age was 68.8 years in the non-myopia group and 56.8 years in the myopia group, with women comprising over 60% of each group. Comorbidities including diabetes, hypertension, and dyslipidemia were more prevalent in individuals without myopia. After adjusting for age, sex, diabetes, hypertension, and dyslipidemia, the adjusted hazard ratio (aHR) for developing glaucoma was 1.44 (95% confidence interval [CI]: 1.43–1.45) for the myopia group and 2.67 (95% CI: 2.62–2.73) for the high myopia group. Regarding glaucoma surgery, the aHR was 1.71 (95% CI: 1.67–1.75) for the myopia group and 3.07 (95% CI: 2.91–3.25) for the high myopia group. Notably, the aHR for filtering surgery such as trabeculectomy was 2.03 (95% CI: 1.94–2.11) for the myopia group and 4.03 (95% CI: 3.67–4.42) for the high myopia group.

Conclusions

Both myopia and high myopia significantly increase the risk of developing glaucoma and the likelihood of requiring glaucoma surgery, especially for invasive filtering surgeries. These findings suggest a need for diligent glaucoma screening and proactive management for individuals with myopia.

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