AIM: To observe and analyze the detection results of child astigmatism before and after cycloplegia and axial changes by using computer automatic refractometer.

METHODS:Sixty cases(120 eyes)with anisometropia founded by subjective optometry were selected as the research object. According to age, they were divided into 3～6 years groups(14 cases, 28 eyes), 7～9 years group(29 cases, 58 eyes)and 10～12 years group(17 cases, 34 eyes). Three groups of patients were given compound tropicamide eye drops for mydriasis. Using automatic computer refractor detected spherical degree, cylinder diopters, astigmatism axis of all patients and made self-control analysis.

RESULTS: Spherical degree and cylinder diopters before and after cycloplegia had statistical difference in children of all ages(P<0.05). The change of astigmatism axis had no statistical significance(P>0.05). After cycloplegia, by camparing the result of automatic computer integrated refractometer and that of inspection shadow optometry, the coincidence rate of spherical, cylinder diopter in 3～6 years group was lower than that of 7～9 years group and 10～12 years group.

CONCLUSION: After cycloplegia, fully automatic computer refractometer can more accurately obtain diopter, easy to operate, has more coincidence rate with optometry. It can be use as prescription basis for children aged 3～12 years.