Vision Screening Online Training Program

Examples of Eye Abnormalities that may be seen during External Inspection - Coloboma

Coloboma - Coloboma of the iris is a congenital defect of the iris of the eye. It is visible as a hole, split, or cleft in the iris.  Coloboma of the iris may appear as a black, round hole located in or adjacent to the iris (colored portion of the eye). It can appear as a black notch of varying depth at the edge of the pupil, giving the pupil an irregular shape. It can also appear as a split in the iris from the pupil to the edge of the iris.  A small coloboma, especially if it is not attached to the pupil, may allow a secondary image to focus on the back of the eye, causing a ghost image, blurred vision, or decreased visual acuity.  Coloboma may be associated with hereditary conditions, trauma to the eye, or eye surgery. The defect may extend to the retina, choroid, or optic nerve.  Definition from:  Medline Plus

Photo of an eye with coloboma, which is a congenital defect of the iris.

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