Retinopathy is the common name of any non-inflammatory disease of the retina, the innermost layer of the eyeball responsible for receiving and sending visual images from the eye to the brain. That is why the term encompasses a range of conditions, but the most common is diabetic retinopathy, which occurs due to elevated blood glucose levels in these patients. The symptoms are not evident during the early stages of this type of retinopathy, which can lead to vision loss, so it is important that diabetics undergo regular eye examinations. Its main treatment is photocoagulation, laser surgery to repair abnormal blood vessels that have been manifested in the retina. Another common condition is blood in the vitreous humour. When bleeding has been severe enough to warrant surgical treatment, a vitrectomy is performed.