![]() For this reason, people with choroidal nevi are usually asked to see their eye doctor on a regular basis so that any growth or changes can be studied further. Choroidal nevi cannot be seen unless your eye doctor looks into the back of the eye. It is important to understand that this is a very rare event, however.įreckles on the skin are easy to see and follow. If this happens the nevus may need to be treated or studied in order to determine if it has turned into a cancer. A similar change may occur to choroidal nevi. ![]() When this happens the freckle may grow in size or change color. Freckles on the skin very rarely can develop into a cancer known as a melanoma. Nevi in many ways are similar to freckles on the skin. If the nevi occur beneath the macula, the central area of the retina responsible for fine vision, they may cause some distortion and blurring of vision. When followed for many years over 5% of choroidal nevi may grow in size. These freckles of pigment in the choroid are known as choroidal nevi.Ĭhoroidal nevi are very common. This tends to occur more commonly as people get older and is similar to aging spots on the skin. Occasionally these pigment cells may clump together forming a freckle. To satisfy this high demand for oxygen, the retina sits on top of a very vascular membrane known as the choroid. The retina has one of the highest demands for oxygen per square millimeter of any tissue in the body.
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