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. 2008 Dec;106:187–195.

FIGURE 3.

FIGURE 3

Change in mean keratometric astigmatism (± standard error) after penetrating keratoplasty (PK) for keratoconus and Fuchs' dystrophy. Mean keratometric astigmatism over the study period increased after PK for keratoconus (P < .001) but was unchanged after PK for Fuchs' dystrophy (P = .55). When comparing keratoconus to Fuchs' dystrophy (indicated by asterisk), the change in mean keratometric astigmatism was not different before 10 years after PK (P = .07), but was greater in keratoconus beyond 10 years after surgery (P = .003).