coloboma

https://doi.org/10.1351/goldbook.10546

Any defect resulting from incomplete closure of the retinal fissure.

Note: The defect may be congenital, pathological, or artificial.
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 738 [Terms] [Paper]