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Intermediate visual function with different multifocal intraocular lens models.

José F Alfonso1, Luis Fernández-Vega, Cristina Puchades

  • 1Fernández-Vega Ophthalmological Institute, Surgery Department, School of Medicine, University of Oviedo, Oviedo, Spain. j.alfonso@fernandez-vega.com

Journal of Cataract and Refractive Surgery
|May 12, 2010
PubMed
Summary
This summary is machine-generated.

Lower addition multifocal aspheric intraocular lenses (IOLs) provide superior intermediate and near vision compared to spherical IOLs or higher addition aspheric IOLs.

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Area of Science:

  • Ophthalmology
  • Optics
  • Biomedical Engineering

Background:

  • Multifocal intraocular lenses (IOLs) are used to correct vision at multiple distances.
  • Different IOL designs and additions may impact visual outcomes.
  • Understanding visual acuity across various distances is crucial for patient satisfaction.

Purpose of the Study:

  • To compare visual acuity at distance, intermediate, and near after bilateral implantation of four different multifocal IOL models.
  • To evaluate the impact of spherical versus aspheric designs and varying diopter additions on visual performance.

Main Methods:

  • Prospective evaluation of 40 eyes (20 patients) implanted with one of four multifocal IOLs: spherical +4.00 D add, aspheric +4.00 D add, aspheric +3.75 D add, or aspheric +3.00 D add.
  • Postoperative assessment at six months included binocular corrected distance visual acuity (CDVA), corrected near visual acuity (CNVA) at 40 cm, and corrected intermediate visual acuity (CIVA) at 50-80 cm.
  • Defocus curve analysis was also performed.

Main Results:

  • All IOL models provided good distance visual acuity with no significant differences.
  • The aspheric IOL with a +3.00 D add demonstrated statistically superior binocular CIVA at 50, 60, and 70 cm and CNVA at 40 cm compared to other models.
  • No significant differences were found between spherical and aspheric IOLs with the same +4.00 D add.

Conclusions:

  • Bilateral implantation of aspheric multifocal IOLs with a lower diopter addition (+3.00 D) resulted in better intermediate and near visual acuity.
  • These findings suggest that IOL design (aspheric vs. spherical) and addition power influence visual performance at different distances.