NCT02228109

Multifocal Lens Centration and Its Effect on Visual Performance in a Presbyopic Population

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 35 (actual)
• Sponsor: University of Waterloo · Academic / Other
• Sex: All
• Age: 42 Years
• Healthy volunteers: Accepted

Summary

The purpose of this study is to use a corneal topographer, a device that is readily available in most optometric practices, in order to determine the position of the multifocal (MF) contact lens (CL) optics in relation to the optics of the eye. The specific purpose of this study is to evaluate if there is a relationship between the positioning of the optics of the study lenses and the objective and subjective visual performance as well as participant satisfaction. The MF CL lenses will be fitted to two groups of participants (previously unsuccessful vs. currently successful MF CL wearers). HYPOTHESES * The measurement of the power distribution acquired from the Medmont E300 corneal topographer is effective in determining MF CL lens centration and is a predictor of MF CL success. * There is a difference in MF CL centration, determined by corneal topography, between successful and unsuccessful MF CL wearers. * MF CL centration, determined by corneal topography, is correlated with visual performance, determined by ocular aberrometry, measures of visual acuity and subjective satisfaction.

Conditions

• Presbyopia

Interventions

Type	Name	Description
DEVICE	Acuvue Oasys for Presbyopia	Acuvue Oasys for Presbyopia contact lenses worn
DEVICE	PureVision2 for Presbyopia	PureVision2 for Presbyopia contact lenses worn
DEVICE	Biofinity Multifocal	Biofinity Multifocal contact lenses worn

Timeline

• Start date: 2014-12-01
• Primary completion: 2015-04-01
• Completion: 2015-04-01
• First posted: 2014-08-28
• Last updated: 2015-05-29

Locations

1 site across 1 country: Canada