Modification of the Intrastromal Ring Position according to Postimplant Visual and Refractive Failure: Report of Two Cases

Figure 2

(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.

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