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Year : 2018  |  Volume : 66  |  Issue : 7  |  Page : 1027-1030

Intercalary membrane as the inner wall overlying optic and chorio-retinal colobomas. Deep penetration Swept Source-OCT study

1 Department of Retina, Jules Gonin Eye Hospital, Fondation Asile des Aveugles, Lausanne, Switzerland
2 Department of Retina, Clínico San Carlos University Hospital, Madrid, Spain
3 Department of Retina and Oftalvist, Pío del Río Hortega University Hospital Valladolid, Spain
4 Department of Ophthalmology, Castilla La Mancha University and Puerta de Hierro Majadahonda University Hospital; Department of Retina, VISSUM Corporation, Spain

Correspondence Address:
Jorge Ruiz-Medrano
38 Melendez Valdes Street, 5D, 28015 Madrid
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijo.IJO_892_17

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Five eyes of four patients were studied to analyze the structure of the inner wall of optic and chorioretinal colobomas using swept-source optical coherence tomography (SS-OCT). The colobomatous cavities and their relationship with adjacent structures were examined. SS-OCT permitted the study of the colobomatous cavities in all cases. In four of those cases, a Y-shaped intercalary membrane (ICM) was identified, with an origin in the retinal nerve fiber layer (RNFL), which covered the coloboma and in one case the coloboma was in contact with the vitreous cavity. Vitreous adhesion to the internal wall of the coloboma was found in three cases. No clinical or tomographic maculopathy was observed in any patient. High-resolution deep penetration SS-OCT allows in vivo study of optic and chorioretinal colobomas, identifying the RNFL as the main component of the ICM overlying the colobomatous cavities.

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