The refractive errors and migraine heasaches

Introudction: Optometrists frequently encounter patients with migraine headache, suspecting that visual anomalies ‎might trigger such headaches. Due to controversial results on the relationship between migraine ‎headaches and refractive errors, this study aimed to investigate the relationship between refractive ‎errors and migraine.‎ ‎ In this case-control study, 60 patients with neurologically diagnosed migraine in the study group and ‎‎60 in the control group were studied. At first, the patients were screened by standard headache ‎questionnaire and the diagnosis was approved by a neurologist. The refractive errors were determined ‎by retinoscopy and corrected if necessary. The control group was selected from the individuals ‎matched based on sex and age. The data were analyzed in SPSS 13, using Mann-Whitney U test and ‎multiple logistic regression. Due to the high correlation between the spherical equivalent of the right ‎and left eyes, only the results of the left eye were presented.‎ ‎ In this study, the means of the sphere in the case and control groups were 0.12‎‏ ± ‏‎0.53 D and 0.04‎‏±‏‎1.58 ‎D (P>0.05) while the mean of the spherical equivalent in the study and control group was –0.38‎‏±‏‎1.75 ‎and –0.14‎‏±‏‎1.74 D (P>0.05). The mean of astigmatism in the study and control group was –0.85‎‏±‏‎0.88 ‎and –0.5‎‏±‏‎1.0 D.