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The Effect of Tropicamide Versus Atropine on the Refractive Errors of Myopic Children
比較Tropicamide與Atropine對近視學童屈光不正之效果
摘要
Purpose: Cycloplegic agents are frequently used for the paralysis of accommodation, particularly in young children, as an aid in. refraction The effectiveness of short-acting cycloplegic agent (Mydrin-p: 0.5% Tropicamide+0.5% Phenylephrine HCl) in relieving the accommodation of myopic children was compared with that of 1% Atropine. Methods: The refractive status of 40 myopic children (80 eyes) was measured with an autorefractometer (Canon RK-2). The data obtained before and after topical administration of Mydrin-p and Atropine were compared. Results: The mean refractive error of these children was -2.37D; and it was -2.12D and -1.87D following the administration of Mydrin-p and 1% Atropine, respectively, with a significant difference (p＜0.0l) between the two medication values. Conclusions: Short-acting cycloplegic agent (Tropicamide in this study) is not as effective as Atropine in relieving accommodation for the verification of pseudomyopic components of refractive errors in myopic children. Although short-acting cycloplegic agents cause less adverse side effects, overcorrection might be possible with its use in the cycloplegic refraction. Therefore, either Atropine should be used or allowance must be made for the inadequacy of Tropicamide as a cycloplegic agent.
關鍵字
無資料並列摘要
Purpose: Cycloplegic agents are frequently used for the paralysis of accommodation, particularly in young children, as an aid in. refraction The effectiveness of short-acting cycloplegic agent (Mydrin-p: 0.5% Tropicamide+0.5% Phenylephrine HCl) in relieving the accommodation of myopic children was compared with that of 1% Atropine. Methods: The refractive status of 40 myopic children (80 eyes) was measured with an autorefractometer (Canon RK-2). The data obtained before and after topical administration of Mydrin-p and Atropine were compared. Results: The mean refractive error of these children was -2.37D; and it was -2.12D and -1.87D following the administration of Mydrin-p and 1% Atropine, respectively, with a significant difference (p＜0.0l) between the two medication values. Conclusions: Short-acting cycloplegic agent (Tropicamide in this study) is not as effective as Atropine in relieving accommodation for the verification of pseudomyopic components of refractive errors in myopic children. Although short-acting cycloplegic agents cause less adverse side effects, overcorrection might be possible with its use in the cycloplegic refraction. Therefore, either Atropine should be used or allowance must be made for the inadequacy of Tropicamide as a cycloplegic agent.