Binocular Defocus Curve of Apodized Diffractive Multifocal IOL in Asian-Indian

Eyes Dr.A. Shetty; Dr. M. K. Kummelil; Dr. S.NagappaCataract and Refractive Lens Surgery Services

Narayana Nethralaya,Bangalore ,India

No Financial Disclosure

Purpose

• To study the Binocular Defocus Curve and its implications for an apodized diffractive Multifocal IOL (MFIOL)

Materials and Methods

• 15 patients who had undergone bilateral implantation of RESTOR 3+ multifocal IOL were included.

• BSCVA for distance was estimated by subjective refraction at the end of 6 weeks post op.

Materials and Methods

• The best spectacle correction was placed in the trial frame.

• Trial lenses ranging in power from +2 to 6 D were placed serially in front of both eyes in 1D increments.

• Distance vision was recorded for each set of trial lenses

Materials and Methods

• A defocus curve was obtained by plotting the mean binocular visual acuities against 9 values of defocus (ranging from + 2.0 to - 6.0 D in 1 D steps).

Results

• 30 eyes of 15 patients• Best Corrected Visual Acuity(Decimal Scale) -– BCDV was 0.94 + 0.13– IDV was 0.53 + 0.17 – BCNV was 0.97 + 0.08

Results –Binocular Defocus Curve

• The mean visual acuity improved from 0.522 logMAR with +2D to 0.0 logMAR with plano.

• It dipped to 0.221logMAR with -1 and -2D• Improved marginally to 0.176logMAR with -3 D

when the near add was neutralized.• Dipped to 0.954logMAR with -6 D.

Conclusion

• The minimal dip of the defocus curve suggests good range of vision and reasonable intermediate vision in patients implanted with the RESTOR 3+ multifocal IOL.