A Comparative Study of the Effect of Mydrin-P and Atropin Eye Drops on the Result of Optometry in Children

Objective To survey the accordance rates of mydriasis optometry and call-back examination after the application of mydrin-P and atropin eye drops in children with ametropia. Methods 186 children with ametropia (372 eyes) served as the subjects of the study. The ametropic eyes of the patients were subjected to quick mydiasis by receiving mydrin-P eye drops every 5 min. for three times. Optometry was carried out 30 min after the last dropping . Call-back examination was performed on the next day after the pupils had reverted to the normal size. Beginning from the same day, the patients were given atropine eye drops t.i.d. for 3 consecutive days for their ametropic eyes. Optometry for these patients was once more performed on the 4~th day and call-back examination carried out 3 weeks later . Results Hyperopia accounted for the majority of ametropia(66.88%) in children below 10 years of age while myopia was more prevalent(64.15%) in children 10-14 years old. In children 10-14 years old who suffered from myopia ,the difference between the results of optometry after mydriasis induced by mydrin-P and atropin, as well as the difference between results of call-back examination after mydrin-P and atropine treatment ,was insignificant(P0.05). These differences, however, were significant (P0.01 or P0.05) in patients with hyperopia who were 10-14 years old as well as in children under 10 years of age who had myopia or hyperopia. Conclusion Mydrin-P was shown to be an ideal drug for mydriatic optometry in children 10 -14 years old who suffered from myopia. However, in children younger than 10 years old suffering from myopia or hyperopia , as well as in children shown to have compound astigmatism as revealed by optometry following mydrin-P, atropin is indicated.