I read with interest the case report by Dailey and colleagues1 in the April 1993 issue of the Archives. The morphologic features of the optic nerve abnormality that they have superbly photographed are compatible with the so-called morning glory anomaly. The dysplasia in this patient is on the mild end of the spectrum2 and vision is well preserved. The clues to the diagnosis in this case are as follows: (1) a round scleral opening as opposed to the vertically oblong opening seen in a typical coloboma; (2) the straightening of the retinal vessels, in this case more evident nasally than temporally; (3) the presence of central glial tissue; (4) the displacement of the macular luteal pigment to the temporal edge of the opening; and (5) the presence of so-called bridging vessels that can be seen on the nasal side in the angiographic view provided by the authors. If
Traboulsi EI. Morning Glory Disc Anomaly or Optic Disc Coloboma? Arch Ophthalmol. 1994;112(2):153. doi:10.1001/archopht.1994.01090140027003
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