Effect Of Decentration Of A Diffractive Trifocal Intraocular Lens On Visual Acuity And Contrast Sensitivity

To examine the correlation of minor, routinely encountered decentration of a diffractive trifocal intraocular lens (IOL) with contrast sensitivity (CS) and visual acuity (VA) one year after implantation.

The Queen Elizabeth Hospital, Adelaide, Australia.

Prospective, non-randomised, consecutive case series.

51 eyes underwent phacoemulsification surgery with implantation of AT Lisa tri 839MP, diffractive trifocal IOL. Twelve months post-operatively, IOL centration relative to pupil centre, VA, aberrometry, tomography and standardised mesopic and photopic CS measurements were assessed. Correlation coefficients were derived for pupil centre to IOL centre distance, higher order aberrations (HOA) and CS.

There was no significant correlation between minor, routinely encountered IOL decentration relative to pupillary axis and CS or HOA on long term follow up. Angle alpha and kappa may have no significant clinical impact on outcomes following implantation of trifocal lenses in cases of routinely encountered physiological decentration.