Management of Corneal Ectasia after LASIK with Phototherapeutic Keratectomy Combined with Photorefractive Keratectomy and Collagen Cross-Linking

Table 1

Preoperative and postoperative patient data for visual acuity, refraction, keratometry, CCT, and endothelial cell density.

	Preop	6 month postop	12 month postop	24 month postop
LogMar UDVA	0.838 ± 0.653	0.594 ± 0.582	0.494 ± 0.502	0.450 ± 0.444
LogMar CDVA	0.413 ± 0.406	0.331 ± 0.61	0.337 ± 0.318	0.313 ± 0.069
Cylinder value (D)	4.156 ± 1.668	2.11 ± 1.099	1.406 ± 0.861	1.234 ± 0.609
Spherical value (D)	5.078 ± 4.55	3.391 ± 4.071	3.281 ± 3.55	2.89 ± 3.145
Steep K (D)	45.675 ± 3.239	41.83 ± 1.326	42.312 ± 1.628	42.612 ± 2.302
Flat K (D)	45.594 ± 1.69	43.125 ± 0.705	42.931 ± 1.345	43.125 ± 1.795
CCT (µm)	416 ± 42.5	406 ± 42.4	390 ± 30.1	393 ± 38.0
ECD	2979 ± 393	2936 ± 349	2823 ± 456	3110 ± 441

LogMar UDVA: uncorrected distance visual acuity in logarithm of the minimum angle of resolution; LogMar CDVA: corrected distance visual acuity in logarithm of the minimum angle of resolution; Steep K (D): mean steep keratometric values in diopters; Flat K (D): mean flat keratometric values in diopters; CCT: central corneal thickness; ECD: endothelial cell density; Postop: postoperatively; Preop: preoperatively. Preoperatively vs postoperatively 6, 12, and 24 months .