. Author manuscript; available in PMC: 2015 Jan 4.

Published in final edited form as: J Pediatr Ophthalmol Strabismus. 2009 Mar-Apr;46(2):83–86. doi: 10.3928/01913913-20090301-04

TABLE.

Prevalence of Ocular Findings and Refractive Errors in Both Groups

Ocular Findings	Down Syndrome Group (n = 77)	Control Group (n = 151)	χ² (df = 2)	P
Nystagmus	15 (19.4%)	0	32.4	< .0001
Strabismus	25 (32.5%)	2 (1.3%)	46.3	< .0001
Hypermetropia	48 (62.3%)	24 (15.9%)	56.1	< .0001
Unilateral	5 (6.4%)	6 (4%)
Bilateral	43 (55.8%)	18 (11.9%)
Astigmatism	46 (59.7%)	38 (25.2%)	32.7	< .0001
Unilateral	9 (12%)	17 (11.3%)
Bilateral	37 (47.7%)	21 (13.9%)
Myopia	6 (7.8%)	26 (17.2%)	3.5	.17
Unilateral	3 (3.9%)	12 (7.9%)
Bilateral	3 (3.9%)	14 (9.3%)
Anisometropia	7 (9%)	6 (4%)	2.65	.13
Congenital cataract	4 (5.1%)	0	8.2	< .01