Fortunately, it is a reversible disease through its removal and replacement with an intraocular lens. Retinal or optic nerve disorders: The retina is the area of the eyeball where light stimuli are transformed into nerve impulses, and it is a very sensitive area to treatment. In addition, chemotherapy can cause increased pressure in the eye, which can damage the optic nerve and cause vision problems. Radiotherapy When radiation therapy is applied in the treatment of head or neck tumors, it can inevitably affect the ocular structures, producing different damages: Conjunctivitis: It is characterized by an inflammation of the conjunctiva, a membrane that partially covers the eyeball. It can cause eye pain, foreign body sensation, and blurred vision. Skin problems on the eyelids: Radiation therapy can cause dryness in the skin of the eyelids and inflammation, even reaching the fall of the eyelashes and the malfunction of the eyelid. https://www.vision20.info/