Table 1.

Epithelial thickness characteristics in contact lens–warpage and keratoconus groups.

	Mean (μm) ± SD
Group	Minimum	Maximum	Superior*	Inferior†	Central
Warpage	47 ± 7	57 ± 4	51 ± 4	52 ± 5	51 ± 6
Keratoconus	44 ± 5‡	63 ± 7‡	57 ± 4‡	51 ± 4‡	53 ± 5
FFK	50 ± 4	55 ± 5	53 ± 5	52 ± 5	53 ± 5
Normal	51 ± 3	57 ± 3	54 ± 3	55 ± 3	55 ± 3

FFK = forme fruste keratoconus

^*Superior values averaged from the 3 octants above the midline

^†Inferior values averaged from the 3 octants below the midline

^‡Statistically different from normal (P < .01)