- Volume 21 Issue 1
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Correlations between Axial Rotation of Toric Soft Contact Lenses and Corneal Eccentricity according to the Wearing Time and Gaze Directions
착용시간 및 응시방향에 따른 토릭소프트콘택트렌즈의 축 회전과 각막이심률과의 상관관계
- Seo, Woo Hyun (Dept. of Optometry, Seoul National University of Science and Technology) ;
- Kim, So Ra (Dept. of Optometry, Seoul National University of Science and Technology) ;
- Park, Mijung (Dept. of Optometry, Seoul National University of Science and Technology)
- Received : 2016.02.03
- Accepted : 2016.03.11
- Published : 2016.03.31
Purpose: The present study was aimed to investigate the effect of corneal eccentricity on the axial rotation when wearing toric soft contact lenses were worn for certain time and changing the gaze directions. Methods: Toric soft contact lenses with double thin zone design applied on 85 of with-the-rule astigmatic eyes. Then, rotational direction and amount of contact lenses were measured after 15 minutes and 6 hours of lens wear. The difference was further compared and analyzed according to corneal eccentricity. Results: The rotation of toric lens showed a tendency to rotate to temporal direction in all gaze directions except temporal-upper direction in all groups of corneal eccentricity. The amount of lens rotation in the frontal gaze direction exhibited a negative correlation since the amount was decreased with increasing corneal eccentricity after both 15 minutes and 6 hours of lens wearing. In many cases, the cornea with small eccentricity also showed the lens rotation larger than
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