Wavefront Analyzer

The unique OPD-Scan III is an advanced vision-assessment system that combines topography, wavefront, autorefraction, keratometry, and pupillometry — allowing accurate and reliable analysis of corneal aberration.

Key Features:

  • OPD Map shows point-by-point eye aberration
  • Many more data points than other aberrometers — allowing precise mapping of irregular astigmatism
  • Improved accessibility to the eye

wavefront-imagesNIDEK, a world leader for vision examination and diagnostic instruments has created the OPD-Scan III, the third generation aberrometer / corneal topographer that is a true refractive workstation for all practitioners.

The versatility incorporated in one compact unit allows clinicians to obtain broad and precise information about the refractive status of the eye enabling comprehensive analysis and assessment, utilizing state-of-the-art data.

Multiple task based summaries allow the practitioner to better evaluate and treat a wide variety of patients from a simple glasses prescription to complex contact lenses and refractive surgery, and especially in pre- and post- operative cataract evaluations.

NIDEK’s innovative concept of combining multiple instruments in one unit was validated in its predecessor, the OPD-Scan II. Continuous development by NIDEK, the leader in the field, makes the OPD-Scan III a faster, more accurate, and more user-friendly instrument than ever before.

Comprehensive Vision Analysis and Assessment

Wavefront Aberrometer

Wavefront aberrometry gives unprecedented assessment of visual acuity and quality of vision in addition to traditional refraction and keratometry. Simulation of retinal contrast sensitivity and visual acuity charts enable objective quantification of visual clarity.


Corneal topography provides intuitive maps and numerical data for the corneal surface.

Auto Refractometer

The auto refractometer provides exceptionally accurate refractions for various pupil diameters including refractions under photopic and mesopic conditions, critical for proper assessment of both refractive surgery patients and common refractive problems.

Auto Keratometer

The auto keratometer provides conventional keratometry and novel corneal surface descriptors such as APP (Average Pupil Power) and ECCP (Effective Central Corneal Power) which aid in the calculation of the correct IOL power for post-operative corneas.

Map and Guide

Interpreting the Overview summary:

  1. Irregularity helps determine the best strategy for vision correction. Separation into Total, Corneal and Internal components allows determination of the source of the optical pathology.
  2. PSF images of OPD, Axial, and Internal OPD map simulate objective retinal visual quality from each component of the eye for easy clinical assessment and patient education.
  3. Corneal Spherical Aberration aids in the selection of aspheric IOLs and contact lenses.
  4. The Astigmatism index aids the implantation of toric IOLs such as incision placement and  lens alignment.
  5. A retroillumination image  of cataracts captured during the OPD exam allows better understanding of pupillary effects on vision and in patient education.

Enhanced Measurement Accuracy and Ease of Use

Wider Measurement Area

The OPD-Scan III’s 9.5 mm diameter wavefront aberrometry ensures full coverage of almost any pupil. Data from 2,520 data points, 175% of the industry leading OPD-Scan II, increases measurement accuracy and spatial resolution.

Greater Topography Resolution

33 blue placido mires provide a minimum of 11,880 data points which is more than 170% of the OPD-Scan II. The blue wavelength allows greater precision in ring detection. The reduced illumination creates a comfortable patient experience.

Tiltable Color LCD Screen

The 10.4-inch color LCD touch screen tilts, allowing viewing from different angles for easier measurements.

High Speed Printer and Auto Cutter

The OPD-Scan III incorporates a high speed user-friendly printer. Printer paper can be easily changed. Printed data sheets are automatically cut for convenience.

OPD-III Image Gallery

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OPD-Scan III Specifications

Wavefront aberrometer
Measurement principleAutomated objective refraction (dynamic skiascopy)
Spherical power range-20.00 to +22.00 D
Cylindrical power range0 to ±12.00 D
Axis range0 to 180˚
Measurement areaø2.0 to 9.5 mm (7 zone measurement)
Data point2,520 points (7 x 360)
Map typeOPD, Internal OPD, Wavefront, Zernike graph, PSF, MTF graph, Visual Acuity
Measurement rings33 vertical, 39 horizontal
Measurement areaø0.5 to 11.0 mm (R = 7.9 mm)
Data point11,880 points and more
Map typeAxial, Instantaneous, "Refractive", Elevation, Gradient, Wavefront, Zernike graph, PSF, MTF graph, Visual Acuity
Auto refractometer
Measurement rangeSphere -20.00 to +22.00 D Cylinder 0 to ±12.00 D Axis 0 to 180˚
Minimum measurable pupil diameterø2.6 mm
Auto keratometer
Measurement rangeCurvature radius 5.00 to 10.00 mm

Refractive power 33.75 to 67.50 D (n = 1.3375)

Astigmatism 0 to ±12.00 D

Axis 0 to 180˚
Measurement areaø3.3 mm (R = 7.7 mm)
Pupillometer / Pupillographer
Measurement diameter1.0 to 10.0 mm
Image typePhotopic, Mesopic
Auto trackingX-Y-Z directions
Display10.4-inch color LCD touch screen
PrinterBuilt-in thermal type line printer for data print
External color printer (optional) for map print
Power supplyAC 100 to 240 V
50 / 60 Hz
Power consumption110 VA
Dimensions / Mass284 (W) x 525 (D) x 533 (H) mm / 23 kg
11.2 (W) x 20.7 (D) x 21.0 (H) " / 51 lbs.

Part # 15-0074