Foveal avascular zone
Within the fovea is a region devoid of retinal vessels known as the foveal avascular zone (FAZ). The geometric centre of the FAZ is often taken to be the centre of the macula and thus the point of fixation. It is an important landmark in Fluorescein angiography. Its diameter is 0.5mm, the central 1.5 degrees of an individual's Visual field.[page needed]
- Basic and Clinical Science Course Complete Set 2012-2013. American Academy of Ophthalmology. 2012.