Study compares rotational stability of toric lens designs

December 15, 2007

A new clinical study demonstrates that lenses using an accelerated stabilization design were superior when compared with lenses using a prism ballast design in two of four tasks designed to mimic real-world viewing conditions involving quick, simultaneous movements of both eyes in the same direction.

Jacksonville, FL-A new clinical study demonstrates that lenses using an accelerated stabilization design were superior when compared with lenses using a prism ballast design in two of four tasks designed to mimic real-world viewing conditions involving quick, simultaneous movements of both eyes in the same direction.

The purpose of the study was to compare objectively the rotational stability of two differently designed toric soft contact lenses over a range of natural viewing conditions using the Eyetrack Monitoring System, an infrared, video-based technique.

Study co-author George A. Zikos, OD, MS, Manhattan Vision Associates, Institute for Vision Research, New York, said, "The rotational position and stability of a contact lens on the eyes during movement are critical in ensuring consistent vision while wearers are performing eye movement tasks required for work or recreation."

"For some patients, it may be necessary to find the most stable lens required for their lifestyle," said Dr. Zikos.

The study was supported by Vistakon, a division of Johnson & Johnson Vision Care.