직난시안에서의 토릭소프트렌즈 피팅 시 축 회전과각막이심률과의 상관관계

A correlation between the rotating direction and rotation amount according to the eccentricity wasanalyzed in the present study when fitting the toric soft contact lens. Methods: One hundred fourteen eyes ofwith-the-rule astigmatism in 20s and 30s were appropriately applied toric soft contact lens by the guideline ofmanufacturer and fitting evaluations and analyzed the rotating direction and rotation amount when fixating atprimary position and 8 different directions of gaze. The speed of reorientation and the correlation between therotation amount and cornea eccentricity were also analyzed when rotating 45o each toward the temporal and nasaldirection. Results: The cornea eccentricity and rotation amount was shown positive correlation. For the gaze ofdirection, it was identified that the gaze of directions other than the gaze of direction towards the nasal andtemporal had correlation, and among them, the gaze of directions to superior and the superior-temporal showedthe tendency of decreasing rotation amount as the cornea eccentricity increased. On the contrary, the gaze ofdirection towards the inferior, inferior-temporal, superior-nasal, and inferior-nasal showed tendency of increasingrotation amount as the cornea eccentricity increased thus, it was identified that the cornea eccentricity showeddifferent correlation according to the gaze of direction. For the case of re-orientational speed, the speed of lens reorientationin the group having the smallest corneal eccentricity was fastest in both direction but was notsignificantly different. Conclusions: Considering cornea eccentricity to current method of prescribing toric softcontact lens which is based on total astigmatism, it will be helpful to establish the optimal axis stabilization.