If retinal detachment is discovered or diagnosed only after a year, the effectiveness of surgical treatment tends to be poorer. However, if there is no eyeball atrophy, no corneal, lens, or vitreous abnormalities at this time, surgery to reposition the retina can still be considered first, followed by assessment of vision recovery. Additionally, an ophthalmic examination should be conducted, including tests like uncorrected visual acuity, corrected visual acuity, intraocular pressure, ocular B-ultrasound, and fundus photography, to decide and predict the outcome of the surgery and post-operative conditions. Nevertheless, even if a year has passed since the retinal detachment occurred, active treatment should still be pursued, and one should not give up.