Figure 5.

Essential tables to implant intracorneal ring segments.^115–118

ACK, k1+k2/2; Astig, astigmatism; CT, central thickness; D, diopters; k, keratometry; KCN, keratoconus; ID, inner diameter; IT, Inner Thickness; mm, millimeter; µm, micrometer (micron); Q, Q value; T, thickness.