Provide a valuable resource to your clients or customers by linking to this resource page. Just place the following link on your website.
A uveal coloboma is a congenital defect where part of the uvea does not form completely, creating a missing segment of tissue. It results from incomplete closure of the embryonic fissure during early fetal development. It can involve the iris, choroid, retina, and sometimes the optic nerve, and severity varies widely. Vision impact depends on which structures are affected and whether the macula is involved.
read more about uveal coloboma ...Coloboma most often appears in the inferior part of the eye because of how the embryonic fissure closes. Iris coloboma can look like a keyhole-shaped pupil, while posterior coloboma can involve the choroid and retina.
Uveal coloboma typically forms when the embryonic fissure does not close fully during early gestation. It may occur in isolation or as part of a genetic syndrome. Some patients have associated systemic findings, so clinicians may recommend additional evaluation when the pattern suggests a syndromic cause. Family history can also influence genetic counseling decisions.
Some people have minimal symptoms, especially with small iris-only colobomas, while others have reduced vision from posterior involvement. Light sensitivity, glare, and decreased visual acuity can occur, and refractive error is common. Chorioretinal coloboma is associated with an increased risk of retinal detachment and may also be linked to cataract in some cases. Any sudden flashes, new floaters, or curtain-like shadow should be treated as urgent.
Management focuses on vision correction, monitoring, and complication prevention. Glasses or contact lenses can address refractive error, and low-vision support may help when posterior structures are involved. Cosmetic or functional options such as tinted lenses can reduce glare in iris coloboma, and surgery may be considered in selected cases. Regular dilated retinal exams are important to monitor for retinal detachment and other complications.
Yes. It is a congenital condition that forms during fetal development. It may be noticed in infancy, childhood, or later, depending on severity and whether it affects vision.
No. Iris-only colobomas may mainly cause glare or be cosmetic, while posterior colobomas can reduce vision if they involve the macula or optic nerve. Visual outcomes vary widely. An eye exam and imaging help estimate likely impact.
Yes. Posterior colobomas are associated with a higher risk of retinal detachment compared with the general population. Regular monitoring and urgent evaluation of new symptoms help protect vision.
It can be sporadic or genetic, and it may occur as part of a syndrome in some patients. If there are other health findings or a family history, your clinician may recommend genetic counseling or additional testing. The plan is individualized.
Ocular coloboma—a comprehensive review for the clinician. Eye (Nature) / PubMed Central (PMC). https://pmc.ncbi.nlm.nih.gov/articles/PMC8302742/. Date Accessed: February 18, 2026.
Optic Nerve Coloboma. Sravanthi Vegunta; Bhupendra C. Patel (StatPearls). https://www.ncbi.nlm.nih.gov/books/NBK532877/. Date Accessed: February 18, 2026.
Choroidal Colobomas: Etiology, Complications, Management. Moran Eye Center (University of Utah). https://morancore.utah.edu/section-12-retina-and-vitreous/choroidal-colobomas-etiology-complications-management/. August 1, 2025.
CHARGE Syndrome. American Academy of Ophthalmology EyeWiki. https://eyewiki.org/CHARGE_Syndrome. Date Accessed: February 18, 2026.
Eyelid Coloboma. Venkata M. Kanukollu; Kyle Blair; Syed Shoeb Ahmad (StatPearls). https://www.ncbi.nlm.nih.gov/books/NBK558905/. Date Accessed: February 18, 2026.