Journal of Ophthalmology / 2017 / Article / Fig 1

Clinical Study

Long-Term Follow-Up of Intrastromal Corneal Ring Segments in Paracentral Keratoconus with Coincident Corneal Keratometric, Comatic, and Refractive Axes: Stability of the Procedure

Figure 1

Preoperative corneal topography (Sirius tomographer, CSO, Italy) and coma wavefront map for a 4.5 mm pupil (Sirius tomographer, CSO, Italy). Note the topographic (blue arrow: 88°) and coma (green arrow: 79°) axes.

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