Radiation therapy is the treatment based on ionizing radiation in order to kill cancer cells and reduce tumors, but it presents different adverse reactions at the place of exposure, in case of having received radiotherapy at the ocular level, the different ones will be affected structures, including the lens, this is an organ very sensitive to radiation, so it develops cataracts or opacities, the appearance of these opacities depends on the dose of RT administered, the area where the therapy is received, the scheme with which it is supplied, and other factors dependent on the patient.

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