| Namespace | MPheno.ontology | Obsolete | false |
| description | any structural anomaly of the ventral groove formed by invagination of the optic cup and its stalk by vascular mesenchyme from which the hyaloid vessels develop; a transient gap in the ventral margin of the developing optic cup that eventually closes to complete the eye wall inferiorly and enclose the hyaloid vessels in a canal in the optic stalk |
