morning glory syndrome

mor·ning glo·ry syn·drome

[MIM*120330] a funnel-shaped hypoplastic optic nerve with a dot of white tissue at its center; surrounded by an elevated anulus of chorioretinal pigment.
A rare, usually unilateral dysplastic coloboma, characterised by mottled peripapillary pigment and an enlarged, funnel-shaped optic disc filled with hyaloid remnants in its base, surrounded by an elevated rim and tortuous radiating vessels—hence the name, likened to the appearance of the morning glory, a flower; it is thought to occur during the 5th week of embryonic development