Table 3. Characteristics of headache in those with spherical REs (myopia or hypermetropia) compared to those with astigmatism .

RE: refractive error

	Spherical RE (n = 178)	Astigmatism (n = 20)	p-Value
Frontal headache	63 (35,4%)	0	0.0005
Holocranial headache	81 (45.5%)	14 (70.0%)	0.037
<1-month duration of headache	29 (16.3%)	10 (50.0%)	0.0003
>2 hours screen time	150 (8.4%)	1 (5.0%)	<0.00001
Family history of headache	17 (9.6%)	1 (5.0%)	0.45