Sawita Khunchamnan, MD¹ , Chatpong Ngamchokwathana, MD¹ , Onsiri Thanathanee, MD² , Chaipak Techapetpaiboon, MD³

Background: Radiation‑induced cataract is a recognized occupational disease among healthcare workers exposed to ionizing radiation, particularly those involved in image‑guided procedures.

Case Report: This case report describes a 32‑year‑old male vascular surgeon who was notified that his lens radiation dose exceeded recommended limits and was subsequently diagnosed with early bilateral posterior subcapsular cataracts (PSC) during ophthalmologic examination conducted as part of the institution’s medical surveillance program. Occupational history revealed 40 months of radiation exposure, with reliable dosimeter records over six months estimating a cumulative lens dose of approximately 0.15 Sv [Hp(3)]— within a range in which increased risk has been reported. Inconsistent use of lead eyewear during earlier practice periods was noted, and no significant nonoccupational risk factors were identified, supporting a probable occupational radiation-associated cataract. Following diagnosis, radiation‑protection measures were strengthened by upgrading lead eyewear from 0.07 to 0.75 mm Pb and implementing administrative and work‑practice controls, in coordination with the occupational health team, to reduce exposure duration. These interventions were associated with a measurable reduction in lens dose from an average of 3.8 to 0.6 mSv per month.

Conclusion: This case of probable occupational radiation-associated PSC in a young vascular surgeon highlights the importance of routine ophthalmologic examination as part of medical surveillance for early detection of radiation-induced lens changes. It also adds to the limited literature on the development of cataract among vascular surgeons and underscores the value of integrating personal protective equipment with systematic radiation control measures to help reduce ocular exposure.

Received 19 February 2026 | Revised 19 April 2026 | Accepted 22 April 2026

J Med Assoc Thai 2026;109(6):559-65

DOI: 10.35755/jmedassocthai.2026.6.04167