By Sixto Del Angel

COLOBOMA What effect does Coloboma By Sixto Del Angel have on vision?

What is Coloboma? The effect coloboma has on vision depends a lot on which A coloboma is a hole in one of part of the eye has been the structures of the eye such affected and how big the gap as the lens, iris, eyelid, retina, is. Normally the gap is at the choroids or optic disc. The bottom and runs from the front hole is present from birth. The to the back of the eye. Most gap in the eye fails to close up commonly coloboma affects completely before the child is only the iris. Their pupil born. Coloboma is frequently maybe shaped a bit like a key referred as a key-chain hole hole. If the coloboma goes defect. further into the eye then the child may have more visual problems, especially if the retina is involved.

What causes Coloboma

Most cases of coloboma appear without any previous family history. If a child is Diagnosis diagnosed with coloboma it is advisable for the child’s If the hospital staff suspect a parents to have an eye child has coloboma, then an examination. This is because ophthalmologist will carry a coloboma can be present full eye examination. It maybe without causing any visual hard to tell how much of the problems. Therefore a parent child’s sight has been affected may have coloboma and not because small children are not know it. able to communicate in words how good their vision is. References

Dictionary of Eye Terminology Gainesville, Florida. Triad Publishing Company.

Gregory-Evans CY, Williams MJ Halford S. Ocular Coloboma: a reassessment In the age of molecular Neuroscience. J.Med Genet. Dec. 2004.

Hall, Amanda Lueck. Functional Vision A Practioner’s Guide To Evaluation and Intervention. New York, NY. AFB Press. 2004 www.rnib.org http://www.cafamily.org.uk/Di rect/c51.html