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Updated: Aug 2, 2026
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Characterization of Molecular Mechanisms of In vivo UVR Induced Cataract
Published on: November 28, 2012
Cataract in atomic bomb survivors
A Minamoto1, H Taniguchi, N Yoshitani
1Department of Ophthalmology, Hiroshima University School of Medicine, Hiroshima, Japan.
International Journal of Radiation Biology
|June 30, 2004
Summary
Atomic bomb survivors exposed before age 13 showed increased risks for certain cataracts decades later. Radiation exposure significantly elevated odds for posterior subcapsular and cortical cataracts.
Area of Science:
- Ophthalmology
- Radiation Epidemiology
- Medical Imaging
Background:
- Atomic bomb (A-bomb) survivors represent a unique cohort for studying long-term health effects of radiation.
- Understanding the delayed impact of radiation exposure on ocular health is crucial for risk assessment.
Purpose of the Study:
- To assess the long-term ophthalmologic effects of atomic bomb radiation exposure.
- To investigate the relationship between radiation dose and the development of specific cataract types in A-bomb survivors.
Main Methods:
- Ophthalmologic examinations were performed on A-bomb survivors exposed before age 13.
- Slit-lamp examination and digital photography were used to grade nuclear, cortical, and posterior subcapsular cataracts.
- Proportional odds logistic regression analysis was employed, considering age, sex, city, dose, and risk factors.
Main Results:
- Radiation exposure was associated with increased odds of developing nuclear colour, nuclear, cortical, and posterior subcapsular cataracts.
- Odds ratios at 1 Sv were highest for posterior subcapsular cataract (1.41) and cortical cataract (1.29).
- These associations remained significant even after excluding individuals with pre-existing posterior subcapsular cataracts.
Conclusions:
- Significant radiation effects were observed in the development of cataracts among A-bomb survivors.
- Posterior subcapsular and cortical cataracts showed a notable increase in odds related to radiation exposure.
- The findings highlight the long-term ocular risks associated with atomic bomb radiation.
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