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There are different kinds of coloboma, depending on which part of the eye is missing. These include:

  • Eyelid Colobma, in which a piece of the upper or lower eyelid is absent.
  • Lens Coloboma, in which a piece of the lens is absent. The lens will typically appear with a    notch.
  • Macular Coloboma, in which the center of the retina, called the macula, doesn’t develop  normally.
  • Optic Nerve Coloboma, which refers to one of two things:
    • Optic nerve coloboma in which an abnormal optic nerve is deeply “excavated” or hollowed out.
    • Optic nerve coloboma that is large enough to involve the optic nerve.