Macular edema is an eye disease that causes accumulation of fluid in the macula, the part of the eye responsible for providing a clear and sharp vision. It is a very sensitive and important area of the eye, when this fluid accumulation occurs vision is lost and distorted way objects are observed. It can also affect only certain parts of the eye or the whole macular area. It is a pathology associated with diabetic patients because it is a major visual impairment sufferers. Treatment is to seal fluid leaks in the macula, which can be done by laser surgery or therapy intraocular injections. Both techniques provide very good results.