MONITORING OF EYE LENS DOSE HP(3) CATHLAB STAFF USING SOCA DOSIMETER. The International Commission on Radiological Protection (ICRP) reduced the cataract threshold dose from 2‒5 Gy to 0.5 Gy, followed by a decrease in the dose limit value (NBD) of the radiation worker's eye lens to 20 mSv/year. Cathlab staff is one of the workers vulnerable to receiving high doses of eye lenses because they work near radiation sources, so staff's eye lens doses need to be monitored. Monitoring is carried out to analyze the dose of eye lenses received by workers and ensure workers are well protected. Eye lens measurement is carried out at Hp(3) or a depth of 3 mm because the lens is sensitive to radiation. Monitoring was carried out for one week on 14 staff (doctors, nurses, and radiographers) and four procedures with an eyepiece dosimeter (SOCA Dosimeter). The eye lens dose obtained for a week ranged from 0.108 – 1.642 mSv, and monitoring per procedure was 0.033 – 0.393 mSv. The annual dose received by workers is based on estimates mostly exceeding the NBD, so tracking with an eye lens dosimeter needs to be done, and eye protection equipment needs to be used to reduce the eye lens dose received. Keywords: Cathlab staff, eye lens dose Hp(3), SOCA dosimeter