Intraocular lens quality control

Introduction

INSTRUMENTS FOR INTRAOCULAR LENS TEST | in production and R&D


Phasics offers two turnkey instruments specifically designed for intraocular lens test.

  • The Kaleo-I achieves a fast and accurate quality control: it provides  IOL power and MTF in compliance to ISO 11979 standard.
  • The Kaleo-R Toric measures semi-finished IOL surfaces for tool adjustment.

 

Both instrument set-up fit IOL testing: cuvette, model eye, and the software packages deliver significant results for IOL.

For

    ISO 11979 quality control

    • Power, cylinder, addition and MTF with model eye
    • For toric, spherical, aspheric, bifocal refractive lens

Lens R&D test

  • Through focus MTF
  • Aberrations of which spherical aberration

Semi-finished lens surface

  • Production process optimization
  • Tool setting and control

Achievements

POWER MAP | for an aspheric lens


LENS-Power-map

THROUGH FOCUS MTF | for a toric lens


The peak of constrast along the sphere or the cylinder axis shifts due to the toric shape

Through-Focus-MTF

SURFACE SHAPE | for a toric IOL


The minimum and maximum radii of curvature are measured, as well as the perpendicularity error between sphere and cylinder meridians

toric-surface-Measurement

Introduction

Phasics sensor measures how the light path is modified after propagating through the intraocular lens. This shift is related to lens wanted function (lens dioptric power and eventually addition or cylinder). It also measures departures (aberrations such as spherical aberration, astigmatism…). Finally it enables calculating the IOL quality as the MTF.

Set Up

IOL in a cuvette with a model eye

► The set-up is designed to be compliant to ISO 11979-2 standard requirements

  • IOLs are placed into saline conditions thanks to a cuvette
  • A model eye is integrated for contrast measurement.
  • Source emits at 546 nm

Advantages

  • Full compliance to ISO 11979-2 standard
  • Very easy alignment
  • Complete characterization
  • 2 user interfaces for production and R&D

Scientific publications

SPIE Optical Systems Design Glasgow

DOI: 10.1117/12.797682

Intraocular lens characterization using a quadri-wave lateral shearing interferometer wave front sensor