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Causes and management of the residual astigmatism after implantation of toric implantable collamer lenses for high myopia with astigmatism

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First Author: X.Wang CHINA

Co Author(s):    Z. Yu   Y. Qian   M. Li   X. Chen   X. Wang   X. Zhou     

Abstract Details

Purpose:

To analyze the causes and management of the residual astigmatism after implantation of Toric implantable collamer lens for high myopia with astigmatism.

Setting:

Eye & ENT Hospital of Fudan University, shanghai, China.

Methods:

The UCVA, BCVA, refraction, vault, topography and astigmatism were measured preoperatively and 1 day, 1 week, 1month, 3 month postoperatively. Preoperative and postoperative data were collected to evaluate possible causes of residual astigmatism after TICL implantation. Different techniques were used to manage the residual astigmatism based on the different causes.

Results:

2558 consecutive eyes of 1610 patients with high myopic astigmatism underwent TICL implantation. 383 eyes (14.8%) had transient astigmatism in the early stage of postoperative period (range, 1 day to 1 week) because of the swollen corneal incision and recovered in 1 month postoperatively. 11 eyes of 6 patients still had persistent astigmatism of more than -1D postoperatively. The main causes included misalignment of axis, lens rotation, and instability of footplates of TICLs. 9 eyes had undergone the axis or footplates adjustment, and 2 eyes had exchanged to larger TICL sizes.3 months after TICL adjustment or exchange, the residual astigmatism ranged from 2.37D to 0.52D. No anterior subcapsular cataracts or other complications occurred during the observation period.

Conclusions:

TICL is an effective and safe method for correction of myopic astigmatism. The main causes of residual astigmatism after TICL implantation is the axis misalignment and lens rotation. The management includes realignment of the axis or exchange to a larger lens to get a higher vault and more stable position.

Financial Disclosure:

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