LENSTAR Biometry

Outstanding optic measurement results

While the introduction of optical biometry revolutionized cataract surgery in the late 1990s, Haag-Streit is writing the latest chapter in biometry history with Lenstar.

Lenstar provides highly accurate laser optic measurements for every section of the eye − from the cornea to the retina. With its integrated Hill-RBF Method, Olsen formula and the optional Toric Planner featuring the Barrett Toric Calculator, Lenstar supplies the user with latest technology in IOL prediction for any patient.

Lenstar at a glance

Biometry of the entire eye in a single measurement

Lenstar simultaneously provides laser interferometric biometry of the entire eye, precise keratometry, astigmatism and axis measurement, WtW and pupillometry simultaneously in a single measurement.
EyeSuite IOL features cutting-edge multivariable IOL formulae for improved refractive outcomes.

Lenstar at a glance

Access to full eye data in a single click

Accurate IOL prediction is crucial for patient satisfaction in state of the art cataract surgery. Lenstar provides all measurements needed to take full advantage of the latest generation IOL prediction methods for improved refractive outcomes with one click.

Optical coherence biometry has revolutionized cataract surgery. Featuring OLCR technology, Lenstar is redefining optical coherence biometry.

Cutting-edge, multivariable IOL calculation prediction with the the Hill-RBF Method, Olsen, Barrett or Holladay 2 formula for sophisticated IOL calculation, demand more than just the axial length and keratometry measurement. Lenstar simultaneously provides all the key biometric parameters.

In a single measurement scan using optical low coherence reflectometry (OLCR), Lenstar captures axial dimensions of all of the human eye’s optical structures, from the cornea to the retina. Lenstar also measures corneal curvature, white-to-white and more.

Lens thickness matters

Hit the target any time

Measured lens thickness paired with the integrated Olsen- and Barrett IOL calculation formulae for excellent refractive outcomes with spheric, toric- and multifocal IOL in any eye.

Lens thickness matters

Improved refractive outcomes

Learn more from Dr. Sheridan Lam about how measured lens thickness allows for significant improvement of the IOL prediction accuracy leading to improved outcomes.

In a clinical study published in the Journal of Refractive Surgery, Dr. Sheridan Lam calculated IOL power using the Holladay 2 formula and biometry with Lenstar, including the measurement of the crystalline lens thickness.

The mean absolute and mean refractive error was calculated for IOL power calculation based on measured lens thickness and on age based lens thickness estimation, a method used if no lens thickness measurement is available for IOL power calculation using the Holladay 2 formula.

Even though the measured lens thickness did not significantly differ from the age based estimation, the refractive outcome did improve significantly in the group with measured lens thickness and lead to a different IOL choice in 30% of the cases.

Dr. Lam concludes: "Lens thickness matters and has to be measured. Ignoring the true lens thickness puts the cataract surgeon and the patient at a disadvantage."

Improved refractive outcomes

Meet patient expectations

Lenstar's full A-scan of the eye and its unique dual zone keratometry provide the foundation for accurate IOL calculation. EyeSuite IOL features the latest generation formulae for improved refractive results in all eyes.

Improved refractive outcomes

Hill-RBF Method - Pattern recognition and boundary model for more accuracy and confidence

The Hill-RBF Method is a purely data driven IOL calculation technique incorporating pattern recognition based in artificial intelligence and sophisticated data interpolation. It features a unique boundary model for improved accuracy and confidence. The Hill-RBF Method is available exclusively on the Lenstar.

Improved refractive outcomes

Excellent IOL prediction in all eyes

Latest generation IOL calculation methods such as Hill-RBF, Olsen and Barrett, implemented in EyeSuite IOL - the IOL planning suite of Lenstar - allow for excellent IOL prediction in short, average and long eyes with standard spherical or toric IOLs. Furthermore, EyeSuite features a comprehensive set of post refractive IOL calculation formulae.

Standard IOL calculation formulae such as SRK/T, Holladay 1 or Hoffer Q - all estimate the effective lens position (ELP) based on axial length and K measurements. This works fine in the average eye but leads to limited prediction accuracy in unusual as well as long or short eyes.
Barrett and Olsen use more parameters, including measured anterior chamber depth and lens thickness to estimate the implant position of the IOL in the eye. The additionally implemented ray tracing in their calculation methods result in formulae that allow for excellent IOL prediction in all kind of eyes; short-, long- and even unusual ones.

Today, IOL calculation in post-keratorefractive patients still is one of the most demanding tasks in cataract surgery. To support the surgeon in this challenging job, EyeSuite IOL features a comprehensive set of cutting-edge IOL calculation formulae for post refractive patients with or without clinical history available.