Table 2. Prevalence of astigmatism (1.00D or more) among term and preterm babies (Right Eye).

Type of astigmatism	Total	Preterm	Term
	(N = 559)	(N = 303)	(N = 256)
With the rule	309 (55.3%)	158 (52.1%)	151 (59.0%)
Against the rule	64 (11.4%)	38 (12.5%)	26 (10.2%)
No astigmatism	186 (33.3%)	107 (35.3%)	79 (30.9%)

Fisher's Exact p between Term and Preterm = 0.26.