Fundoscopy image of the retina of the right eye of a female patient with vitreomacular traction (VMT) and a retinal macroaneurysm. As part of the normal aging process the vitreous humour, the clear gel that fills the eyeball, shrinks and pulls away from the retina, the light-sensitive layer lining the inner surface of the eye. Eventually it will separate from the retina entirely. In cases of VMT part of the vitreous remains attached to the centre of the retina, known as the macula. This vitreous pulls on the macula, causing damage that can lead to distorted vision. Retinal macroaneurysm is the dilation of a retinal artery. Severe cases of VMT can be corrected with surgery.