Definition of coloboma in English:



mass nounMedicine
  • A congenital malformation of the eye causing defects in the lens, iris, or retina.

    • ‘Newborns with aniridia or coloboma should have a formal eye examination.’
    • ‘Depending on the extent and location of the coloboma, there may be decreased visual acuity, nystagmus, strabismus, photophobia, and a loss of visual fields.’
    • ‘Complete coloboma is when all of the structures of the eye are involved; these are the choroid, the retina, the optic disk, the ciliary body, the macular and the iris.’


Mid 19th century: modern Latin, from Greek kolobōma ‘part removed in mutilation’, from kolobos ‘cut short’.