The Nidek Marco OPD Scan III Corneal Topographer is an autorefractor, keratometer, pupillometer (up to 9.5mm), corneal topographer, and integrated wavefront aberrometer.
Nidek Marco OPD Scan III Corneal can complete 20 diagnostic metrics in less than 10 seconds per eye (including angle kappa, angle alpha, HOAs, average pupil power, RMS value, and point spread function). Plus, easy and automatic alignment and data capture ensures accurate results.
The Nidek Marco OPD Scan III gave slightly more negative readings than results obtained by subjective refraction (Nidek mean difference -0.19 ± 0.36 DS, p < 0.01 for sphere; -0.19 ± 0.35 DS, p < 0.01 for mean spherical equivalent; -0.002 ± 0.23 DC, p = 0.91 for cylinder; -0.06 ± 0.38 DC, p = 0.30 for J0 and -0.36 ± 0.31 DC for J45 , p = 0.29).
Auto-refractor results for 74 percent of spherical readings and 60 percent of cylindrical powers were within ± 0.25 of subjective refraction. There were high intra-session and inter-session repeatability for all parameters; 90 percent of inter-session repeatability results were within 0.25 D. The Nidek OPD-Scan III gives valid and repeatable measures of objective refraction when compared with non-cycloplegic subjective refraction.
Nidek Marco OPD Scan III Key feature
Performance
175% Increase in Measurement Accuracy and Spatial Resolution
Technology
Greater Topography Resolution with 33 Blue Placido Rings
Measurement Principle
Automated Objective Refraction (Dynamic Skiascopy)
Spherical Power Range
-20.00 to +22.00 D
Cylindrical Power Range
0 to ±12.00 D
Axis Range
0 to 180˚
Measurement Area
ø2.0 to 9.5 mm (7 Zone Measurement)
Data Point
2,520 points (7 x 360)
Map Type
OPD, Internal OPD, Wavefront, Zernike Graph, PSF, MTF Graph, Visual Acuity
Blue Placido Rings
Minimum of 11,880 Data Points
Display
10.4-inch Tiltable Color LCD Touch Screen
Ports
LAN, USB
Power Supply
AC 100 to 240 V, 50/60 Hz
Power Consumption
110 VA
Dimensions
Width: 11.2 in (284mm)
Depth: 20.7 in (525mm)
Height: 21.0 in (533mm)
Weight
51 lbs. (23kg