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Idiopathic tractional corectopia
C S Atkinson1, M C Brodsky, D A Hiles
1Department of Ophthalmology, University of Pittsburgh, Pa.
Insights
Congenital unilateral corectopia in infants, caused by iris-cornea fibrous strands, can progress but is treatable. Early medical or surgical intervention ensures favorable visual outcomes.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
- Developmental Biology
Background:
- Congenital unilateral corectopia is a rare pupillary abnormality.
- Understanding its causes and optimal management is crucial for pediatric eye care.
Observation:
- Four infants presented with unilateral corectopia due to a fibrous structure tethering the iris to the cornea.
- No associated congenital anomalies or intrauterine infections were noted.
- Progression of corectopia occurred in three infants within the first six months of life.
Findings:
- Two infants with shallow anterior chambers underwent surgical intervention (Nd:YAG laser or incisional surgery).
- One infant was managed with medical mydriasis.
- All four infants achieved favorable visual outcomes following treatment.
Implications:
- The fibrous strands may originate from incomplete regression of embryonic vascular systems.
- Intervention is recommended for corectopia affecting the visual axis or threatening ocular structures.
- Prophylactic occlusion therapy may be beneficial in select cases.
Abstract:
Four infants were referred for congenital unilateral corectopia. In each case, the abnormal position of the pupil was caused by a fibrous structure that tethered the iris pupillary margin to the peripheral cornea. No patients showed characteristics of intrauterine infection, Rieger anomaly, ectopia lentis et pupillae, or iris coloboma. Amblyopia was not present in any of the patients. Three children demonstrated progression of the corectopia in the first 6 months of life. Two who developed shallow anterior chambers were treated surgically, one with an Nd:YAG laser and the other with incisional surgery. The third was treated with medical mydriasis. All four children have had favorable visual outcomes to date. The origin of the tethering strands is unclear but may be related to incomplete regression of vessels from the embryologic vascular system. We recommend medical or surgical intervention for unilateral corectopia when the pupillary aperture is displaced peripheral to the central visual axis or when the position of the iris threatens angle structures. Prophylactic occlusion therapy may also be indicated.