. 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

Table 4.

Corneal thickness and the central to peripheral thickness ratio in Fuchs dystrophy and normal corneas.

	Fuchs Dystrophy (118 eyes)	Normal (267 eyes)	p^a
CCT (μm)
Ultrasound	614 ± 57	562 ± 30	<0.001
Scanning-slit	652 ± 61	559 ± 31	<0.001
PCT (μm) at stated distance from center (Scanning-slit)
3 mm (PCT₃)	650 ± 55	610 ± 35	<0.001
3.6 mm (PCT_3.6)	654 ± 54	629 ± 39	<0.001
4 mm (PCT₄)	650 ± 51^b	643 ± 43^c	0.002
CPTR at stated distance from center (Scanning-slit)
3 mm (CPTR₃)	1.01 ± 0.05	0.92 ± 0.03	<0.001
3.6 mm (CPTR_3.6)	1.00 ± 0.06	0.89 ± 0.04	<0.001
4 mm (CPTR₄)	1.00 ± 0.07^b	0.87 ± 0.05^c	<0.001

Mean ± standard deviation.

CCT, Central Corneal Thickness

PCT, Peripheral Corneal Thickness

CPTR, Central to peripheral thickness ratio

Fuchs versus normal after adjusting thickness for age.

n=107 for PCT₄ and CPTR₄, because thickness could not be measured at 4 mm from the center in all subjects.

n=254 for PCT₄ and CPTR₄, because thickness could not be measured at 4 mm from the center in all subjects.