TABLE 5.

Difference in steep corneal power (K) in dioptres (D) between the fellow eyes of individuals from the Collaborative Longitudinal Evaluation of Keratoconus (CLEK) study with and without keratoconus, compared with individuals with Down syndrome (DS) who were either detected as having an eye suspicious for keratoconus or not.

	CLEK myopic subjects49 (n = 330)	Individuals with Down syndrome with neither eye detected (n = 61)	DS subjects with one or more eyes detected (n = 27)	CLEK keratoconus subjects49 (n = 1068)
Steep K between Eyes (D)	−0.36 ± 0.37	−0.60 ± 0.85	−0.50 ± 0.40	−4.35 ± 4.41

Note: Data from Marsack et al.46