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. 2013 Jul 19;19:1526–1537.

Table 2. Mean area and density of PGs of normal, keratoconus, and XL cornea.

Sample Number of corneas Number of PGs Mean PGs
Area (nm2) ±SD Median
Area (nm2)
Normal Cornea
3
662
122.26±78
104.22
Keratoconus Cornea
3
622
252.3±135
157.00
XL Cornea 3 631 189.0±149 156.98

Significant difference between Normal and CKC p<0.0001 Significant difference between Normal and CXL p<0.0001 Significant difference between KC and CXL p<0.0001.