Biometry

Biometry

Optical biometry

Comprehensive all-in-one solution for accurate IOL prediction

Optical Low Coherence Reflectometry

Precise measurement of the entire eye

In a single measurement scan using optical low coherence reflectometry (OLCR), the Lenstar 900 captures axial dimensions of the human eye’s optical structures on the patient’s visual axis. Besides highly precise measurements of the axial length (AL), it also provides central corneal thickness (CCT) with a reproducibility of approximately ±2 μm, anterior chamber depth (ACD), lens thickness (LT) and much more to meet the requirements of latest generation IOL calculation formulae.

White-to-white & pupillometry

Comprehensive eye data

Based on high-resolution color photography of the eye, the Lenstar 900 provides reliable white-to-white measurements to be used in advanced IOL calculation formulae. In addition, color photography can be used for identification of anatomical landmarks and orientation in the surgical planner and in the OR. Lenstar 900 further includes measurement of the pupil diameter in ambient light conditions. These are a useful indicator for the patient’s suitability for premium IOLs, as well as for laser refractive procedures.

Data validation

Certainty included

Because each measurement is automatically repeated several times, the Lenstar 900’s measurements are highly accurate and repeatable. This offers certainty and peace of mind. In case of unusual eyes or unexpected results, the user can review, exclude, and even recalculate raw data, providing full transparency and control.

Dense Cataract Mode

High penetration rates in dense cataracts

Dense cataracts make accurate axial lengths measurements challenging. To ensure high cataract penetration rates, Lenstar 900 offers the Dense Cataract Measurement (DCM) Mode. With its advanced digital signal processing, DCM increases penetration rate to ensure every patient is measured accurately for precise IOL power prediction.

View fullscreen

Biometry dashboard

All biometry data at a glance

The comprehensive biometry dashboard allows comparison of data from the left and right eye for all parameters. These include axial biometry, keratometry, pupillometry, and white-to-white data. On this dashboard, unusual data sets are easily identified. In such cases more detailed views are available for powerful data review.

View fullscreen

Axial biometry scan

Management of difficult and rare cases

The A-scan view provides detailed insight into the measurement data. This enables identification of measurement errors related to the presence of contact lenses or previously implanted IOLs measured with the standard phakic measurement mode. In such cases, users have the flexibility to manually adjust gates. Additionally, it is possible to include or exclude data points as needed to enhance the overall data quality.

View fullscreen

Pupillometry

Examination of pupil centricity

This pupillometry screen offers a comprehensive overview of pupillometry measurements. It enables browsing through acquired images and recalculating the central position of the pupil. Like with the other views, it is possible to exclude measurement data.

View fullscreen

White-to-white

Close examination of image quality

The detailed white-to-white screen enables examination of high-quality color images of the eye including the sclera, limbus, iris, and pupil. This view assists in identification of artefacts caused by closed eyes or eyelashes that interfere with the measurement area and segmentation of the iris.