Case Report
Modification of the Intrastromal Ring Position according to Postimplant Visual and Refractive Failure: Report of Two Cases
Figure 1
(a) Topography pretreatment. (b) Ferrara nomogram. (c) First intrastromal ring position. (d) KeraRing nomogram position. (e) One-month postimplantation ring position. (f) One-year postmodification ring position.