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[Pupil centroid shift: Marketing tool or essential clinical parameter?].

I Fischinger1, T G Seiler, G Schmidinger

  • 1Institut für Refraktive und Ophthalmo-Chirurgie (IROC), Stockerstr. 37, 8002, Zürich, Schweiz, isaak.fischinger@hotmail.com.

Der Ophthalmologe : Zeitschrift Der Deutschen Ophthalmologischen Gesellschaft
|January 9, 2015
PubMed
Summary

Pupil centroid shift (PCS) is a key surgical planning parameter. Up to 15% of patients exhibit significant PCS, impacting refractive and cataract surgery outcomes, especially with multifocal IOLs.

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Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft·2014

Area of Science:

  • Ophthalmology
  • Optometry
  • Surgical Planning

Background:

  • Pupil centroid shift (PCS) is a measurable parameter often overlooked in surgical planning.
  • Understanding PCS is crucial for optimizing visual outcomes in ophthalmic procedures.

Purpose of the Study:

  • To establish the physiological range of pupil centroid shift (PCS).
  • To assess the significance of PCS in refractive and cataract surgery.

Main Methods:

  • Measured pupil center in 103 eyes using Allegro Topolyzer Vario.
  • Determined PCS difference between mesopic and photopic conditions (PCSm).
  • Extrapolated PCS to 2mm and 7mm pupil diameters (PCSe) for photopic-scotopic comparison.

Main Results:

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  • Average PCSm was 0.12 ± 0.08 mm; 2% exceeded 0.4 mm.
  • Average PCSe was 0.24 ± 0.16 mm; 15% exceeded 0.4 mm.
  • 3% of eyes had PCSe > 0.7 mm; no demographic correlations found.

Conclusions:

  • Significant PCS (up to 15%) necessitates surgeon decisions on optical zone centering.
  • PCSe > 0.7 mm advises against multifocal intraocular lens (IOL) implantation.
  • PCS is a critical factor in achieving optimal surgical results.