Inhibiting the effect of 90Sr-90Y ophthalmic applicators on rat corneal neovascularization induced by sutures

AIM: To investigate a practical technique used to inhibit corneal angiogenesis with a Sr-90-Y-90 ophthalmic applicator. METHODS: A Sr-90-Y-90 ophthalmic applicator was detected with a radioactive nuclide application treatment healthy protection standard. The applicator used was produced through medical dosimetry research; it had a concave applicator add measured the applicator temperature, serviceable humidity range, applicator appearance status, applicator radiation homogeneity, radioautography, and radiological safety of the original applicator surface. A vessel model was established using newborn rats, with sutures around the corneal limbus. Corneal neovascularization (CNV) were observed with a slit lamp. The new vessel length and response area were measured. RESULTS: Low-dose radiation can inhibit CNV after corneal sutures. The absorbed dose of the applicator (0.046 Gy/s) was safe for the treatment of it. The lengths of new vessels and the areas of new vessels were lower than the new born vessel rat group (P<0.01). CONCLUSION: The optimal radiation dose emitting from the applicator can be safe and potentially used in humans.