Purpose: To assess the outcomes of intrastromal corneal ring (ISCR) implantation for the treatment of corneal ectasia. Methods: Thirty-five consecutive patients with secondary corneal ectasia treated with keraring intrastromal corneal ring segment implantation aided by intralaser femtosecond technique (K-ICRS-FS) were evaluated. Visual acuity (logMAR), refraction and astigmatism vector analysis were measured preoperatively and 3 months postoperatively using vector analysis as described by some authors. Conclusion:Intrastromal corneal ring implantation with the use of a femtosecond laser was a safe procedure, with low risk of complications and significant improvement on visual acuity and topographic data in this seeting of patients with secondary corneal ectasia. de 0,40 ± 0,20 para 0,25 ± 0,13 (p=0,0002), com diminuição do equivalente esférico de 5,41 ± 4,78 D no préop. para 2,83 ± 3,29 D no pósop. (p=0,0002) 51,65 ± 5,83 D para 48,58 ± 5,54 D (p=0,000) e o K mínimo de 45,92 ± 4,64 D para 43,96 ± 5,06 D (p=0,0041 Keywords