Nidek OPD-Scan III Wavefront Aberrometer

The OPD-Scan III is an autorefractor, keratometer, pupillometer
(up to 9.5mm), corneal topographer,
and integrated wavefront aberrometer.
The OPD-Scan III completes 20 diagnostic metrics in less than
10 seconds per eye (including angle kappa, HOAs,
average pupil power, RMS value, and point spread function).
Easy alignment and automatic capture of wavefront aberrometry
data ensures accurate readings. Wavefront aberrometry data is
gathered from available zones up to a 9.5mm area, adding the
capability to provide for calculation of mesopic refractions.
Blue light, 33 ring, placido disc topography is gathered in
one second.

Mapping methods include OPD, visual acuity corneal
topography/topographer, and more.
Power Mapping
Spherical Power Range: -20.00 to +22.00 D
Cylindrical Power: 0.00 to ±12.00 D
Axis: 0 to 180°
Measurement Area: 2.0 to 9.5 mm (7 zone measurement)
Data Points:2,520 points (7 x 360)
Measuring time: < 1.0 seconds
Measurement Method: Automated objective refraction
(dynamic skiascopy)
Mapping Methods: OPD, Internal OPD, Wavefront maps,
Zernike graph, PSF, MTF graph, Visual Acuity Corneal Topography
Measurement Rings: 33 vertical, 39 horizontal
Measurement Area: 0.5 to 11.0 mm (r = 7.9)
Dioptric Range: 33.75 to 67.5 D
Axis Range: 0 to 359˚
Data Points: More than 11,880
Mapping Methods: Axial, Instantaneous, “Refractive”, Elevation,
Wavefront maps, Zernike graph, PSF, MTF graph, Visual Acuity

General Information
Working Distance 75 mm
Auto Tracking X-Y-Z directions
Observation Area : 14 x 11 mm