It is formed by an invagination of the hyaloid membrane, which encloses the vitreous body. In the postnatal eye, Cloquet's canal marks the former location of the hyaloid artery. Occasionally the artery may not fully regress, resulting in the condition "persistent hyaloid artery". The anterior hyaloid membrane separates the front of the vitreous from the lens. The posterior hyaloid membrane separates the rear of the vitreous from the retina.