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. Author manuscript; available in PMC: 2014 Apr 1.
Published in final edited form as: Ophthalmology. 2013 Jan 28;120(4):687–694. doi: 10.1016/j.ophtha.2012.09.022

Figure 4. Relationship between the central-to-peripheral thickness ratio at 4 mm (CPTR4) and clinical grade of Fuchs dystrophy.

Figure 4

CPTR4 was correlated with the grade of Fuchs dystrophy (r= 0.77, p<0.001, n=359); grade 0 represents corneas without Fuchs dystrophy. The regression line is a third-order polynomial indicating that there are two phases of central corneal edema; the first phase was at grades 1 to 4.5, and the second phase was at grades 5 to 6.