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Miyake-Apple study of the rotational stability of the Acrysof Toric intraocular lens after experimental eye trauma
F A S Pereira1, E J Milverton, M T Coroneo
1Sight for Life Foundation, Sydney Eye Hospital, Sydney, Australia. fpereira@task.com.br
Purpose:
To evaluate the rotational stability of the Acrysof Toric intraocular lens (IOL) after experimental eye trauma.
Methods:
Two human cadaver eyes were prepared in accordance with the Miyake-Apple technique, with closed-system modification. After phacoemulsification, an Acrysof Toric IOL was implanted in the capsular bag. Experimental traumatisation of the globe was achieved by pressing against the eye wall using a cotton tip or a fingertip, whereas the IOL was observed from the posterior view. Digital photographs of the eye before and after the procedures were overlaid to detect and measure rotation of the IOL.
Results:
The IOL rotated 5.80 degrees when the traumatic procedures did not cause important leakage from the incision. When the traumatic procedures caused important leakage from the incision and anterior chamber collapse, the IOL rotated 41.00 degrees.
Conclusion:
Ocular trauma can cause rotation of the Acrysof Toric IOL. In the event of an eye trauma with no or insignificant leakage from the incision, the IOL rotates less than when the trauma causes significant leakage from the incision.