PMC5437428_01
Slit-lamp photograph of the right eye (a) and the left eye (b) showing marked peripheral and central corneal thinning with forward bulging consistent with keratoglobus.
cop-0008-0279-g01.jpg
PMC5437428_01_cop-0008-0279-g01.jpg
F1
On slit-lamp examination the patient had bilateral central and peripheral corneal thinning with a forward bulge typical of keratoglobus, in addition to mild central corneal scars (Fig. 1a, b). Bilateral peripheral corneal thinning was evident clinically and in the topographic maps (Fig. 1, 2c, f).
Corneal topography displaying the preoperative sagittal curvature, pachymetric, and anterior segment cross-section maps of the right eye (a-c, respectively) and the left eye (d-f, respectively). Notice the marked peripheral and central corneal thinning.
cop-0008-0279-g02.jpg
PMC5437428_01_cop-0008-0279-g02.jpg
F2
Corneal topography (Pentacam; Oculus Optikgerate GmbH, Wetzlar, Germany) was done to assess keratometry and thickness of the cornea at various points (Fig. 2a-f). Simulated keratometry was 49.5/59.8 dpt at 81  and 51.2/54.3 at 110  in the right and left eye, respectively (Fig. 2a, d). Pachymetric maps revealed a central thickness of 275 mum in the right eye and 321 mum in the left eye; the thinnest areas were 211 and 203 mum in the right and left eye, respectively (Fig. 2b, e). Bilateral peripheral corneal thinning was evident clinically and in the topographic maps (Fig. 1, 2c, f).