Decompensation of ocular torsion following malrotation of a toric intraocular lens.

Toric intraocular lenses (IOLs) are being increasingly used to correct corneal astigmatism in cataract surgery. A quarter of patients that undergo cataract surgery may benefit from a toric rather than a spherical IOL. However, these implants must be positioned accurately, because postoperative rotation of the toric IOL can have clinically significant consequences. We present the first documented case of a 78-year-old woman who presented with diplopia as a result of exacerbation of a preexisting torsion following toric lens implantation.