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 4
Variation in CDVA between the visit at 6 months and the final visit at five years, for the whole sample and for group I (younger patients) and group II (older patients).