Optical Biometer AL

Optical Biometer

AL – Scan

Brand : Nidek – Japan

NIDEK’s solution is the state of the art optical biometer – the AL-Scan. In 10 seconds, six values for cataract surgery are measured:

Axial length
Corneal curvature radius
Anterior chamber depth
Central corneal thickness
White-to-white distance
Pupil size

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3-D Auto Tracking and Auto Shot

The AL-Scan incorporates NIDEK’s much acclaimed 3-D auto tracking and auto shot, enabling accurate measurement with ease and comfort. The 3-D auto tracking follows eye movements along the X-Y-Z directions to ensure accurate alignment of the eye. Once correct alignment is completed, the auto shot immediately captures the image and data

Anterior Segment Observation with Scheimpflug Imaging and Double Mire Ring Keratometry

The AL-Scan provides sectional lens image, pupil image, and reflected image of double mire rings projected onto the cornea.

The sectional lens image assists in the evaluation of the severity of the cataract. The pupil image assists in the assessment for multifocal IOL. The reflected image of mire rings assists in detecting an irregular corneal surface.

Optional Built-in Ultrasound Biometer

In cases where the optical biometer cannot measure an eye with an extremely dense cataract, the AL-Scan provides an optional built-in ultrasound biometer, allowing measurement of virtually any cataractous eye with a combined model.

The AL-Scan requires no connection with an external ultrasound unit.

IOL Power Calculation and IOL Constants Optimization

The IOL power is automatically calculated after measurement

Calculation of a personalized IOL constant improves postoperative accuracy.

IOL power calculation formula on AL-Scan

SRK, SRK II, SRK/T, Binkhorst, Hoffer Q, Holladay 1, Haigis, Camellin-Calossi, Shammas-PL

Additional Barrett formulas available for the NAVIS-EX AL-Scan Viewer Barrett Universal II, Barrett True-K, Barrett Toric Calculator

AL-Scan Viewer for NAVIS-EX

AL-Scan Viewer is software used for viewing and working with AL-Scan data via NAVIS-EX.
This function enhances the capability of the AL-Scan with additional features and increases the efficiency of any clinic.

NAVIS-EX is an image filing software that enables data from the NIDEK diagnostic devices to be centralized in the NAVIS-EX database. It was initially developed for NIDEK’s retinal products and has been expanded to network with the AL-Scan.

* NAVIS-EX is optional software and is required for use of the AL-Scan Viewer.