Ocular Surface Disease Index and Ocular Thermography in Keratoconus Patients

Table 4

Spearman correlation of vision- and discomfort-related Ocular Surface Disease Index (OSDI) subscores with surface characteristics at the corneal centre in different stages of keratoconus (KC) and controls.

	SAI	SRI	Central OST
KC4–VR OSDI	−0.29	−0.08	−0.18
KC3–VR OSDI	−0.12	−0.05	−0.007
KC2–VR OSDI	−0.07	0.26	0.03
KC1–VR OSDI	0.33	0.02	0.35
Control–VR OSDI	0.22	0.32	−0.07
KC4–DR OSDI	−0.18	0.24	−0.09
KC3–DR OSDI	−0.27	−0.19	−0.04
KC2–DR OSDI	−0.15	0.18	0.02
KC1–DR OSDI	0.27	0.18	0.45
Control–DR OSDI	0.26	0.25	−0.01

VR, vision-related; DR, discomfort-related; SAI, surface asymmetry index; SRI, surface regularity index; OST, ocular surface temperature. r values are given, with values shown in the case of significance.