Hello dear, A detached retina lacks oxygen, which causes cells in the area to die. This leads to loss of vision, which is gradual in nature & ultimately results in permanent blindness. Repair is needed to prevent this permanent vision loss. The treatment modality (which ranges from Cryotherapy & Laser photocoagulation to Pneumatic retinopexy & Vitrectomy) is decided by the Ophthalmologist after a proper fundus examination & ruling out the risk factors for recurrence like Diabetes (Diabetic retinopathy), Hypertension (Hypertensive retinopathy), High degree of myopia, Increased intra-occular pressure, etc. So, it is advisable to get a corrective operation before any permanent damage occurs. Wishing you a good health. Take care.