Table 2 Progression in different studied parameters.

From: Increased choroidal thickness is not a disease progression marker in keratoconus

Parameters (cutoff value)

Progressors n (%)

Kmax (1D increase)

20 (26.3%)

Km (0.75D increase)

17 (22.4%)

Pachymin (2% decrease)

21 (27.6%)

D-Index (0.42 increase)

32 (42.1%)

Astig (1D increase)

7 (9.2%)

K2 (1D increase)

17 (22.4%)

3 mm PCR (0.085 mm decrease)

32 (42.1%)

Progression in at least 2 parameters simultaneously

36 (47.4%)

  1. Number and percentage of Keratoconus progressing eyes when considering each progression parameter alone, and when progression occurs simultaneously in at least 2 parameters. The cutoff values used to document progression are listed for each parameter. Kmax, maximum keratometry; PachyMin, minimum pachymetry; Km, mean keratometry; K2, keratometry of steepest meridian; Astig, corneal astigmatism; 3 mm PCR, posterior radius of curvature from the 3.0 mm centered at the thinnest point; D-Index, Belin/Ambrósio Deviation Index; D, Diopter.
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