Objectives: To demonstrate the features of optic disc pits and colobomas revealed by high-resolution OCT and their association with the development of maculopathy.
Methods: Subjects with disc pits or colobomas and no other ocular history underwent full ophthalmic examinations including logMAR visual acuity and contrast sensitivity. Fundus photographs and high-resolution OCT images were obtained.
Results: 7 patients were identified with optic disc pits or colobomas aged 25 to 63 years. 5 patients had a unilateral optic disc pit, one had a unilateral disc coloboma and another had bilateral disc colobomas. Apart from one eye with a grossly anomalous disc vision was logMAR 0.4 or better in all eyes. In 3 of 5 eyes without maculopathy a complete membrane could be identified traversing the optic disc cup that was absent or deficient in the 3 eyes with maculopathy. One patient with optic disc pit and marked schisis-like separation of the retinal layers throughout the macula was asymptomatic with logMAR visual acuity of 0.0 and normal achromatic contrast sensitivity.
Conclusions: In this small series of patients with optic disc pits or colobomas we were able to identify a membrane spanning the optic disc cup and we speculate that this may protect against the development of maculopathy. Schisis-like separation of retinal layers can be associated with normal visual function.