토릭소프트렌즈 피팅 시 축 회전과 각막난시와의 상관관계

The present has analyzed the correlation between the direction of lens and the amount of rotation uponsoft toric contact lens fitting after classifying the corneal astigmatism. Methods: Soft toric contact lens was fittedon 114 with-the-rule astigmatic eyes with total astigmatism of at least −0.75 D in their 20s and 30s according tothe fitting guideline of the manufacturer and the correlation between the astigmatic degree and the rotationaldirection/amount of rotation was analyzed by when keeping the eyes on the front and by changing the directionof gaze. As for re-orientation movement. The speed of lens re-orientation and total amount of lens rotation wascompared and analyzed by corneal astigmatism after mis-location of lens of 45o to temporal and nasal direction,respectively. Results: The positive correlations were shown between corneal astigmatism and the direction of lensrotation and between corneal astigmatism and the amount of lens rotation. Meanwhile, the amount of lens rotationwas different by the direction of gaze however, there was no correlation with corneal astigmatism. The speed oflens re-orientation was fastest in the group of high astigmatic degree when the lens was mis-located to bothtemporal and nasal directions. Conclusions: For optimal axis stabilization of toric soft lens, it is proposed that theadjustment of fitting guideline considering corneal astigmatism is necessary since the current fitting guideline isonly based on total astigmatism.