Optical Marketplace

Nidek ARK-730a is an auto ref/keratometer which contains both a refractometer and a keratometer in one unit. The refractometer objectively obtains the spherical power,cylindrical power and cylinder axis for the lens that corrects the patient’s vision into emmetropia.
The Marco Nidek ARK-730a measures the corneal curvature radius, corneal refractive power, corneal cylindrical power and corneal cylinder axis. Weak infrared rays are used for these measurements. This instrument has a main body and a measuring unit integrated on one base. On the base is a chin rest on the patient’s side and a printer on the operator’s side.
On the main body is a TV monitor and a joystick which are used to make alignment and perform operations. The measuring unit has a measuring window, through which the patient looks into to view the chart and which the infrared rays radiate on the patient’s eye. Also, there is an auto-tracking mechanism, which automatically moves the measuring unit up, down, right, left, back and forth to follow eye movement, and an auto-shot function, which automatically takes serial measurements when the instrument becomes properly in focus.
Marco has added the ARK-730A, offering several enhanced features, to its line of automated refractors/keratometers. The ARK-730A provides fully automatic alignment, tracking and focusing to ensure reliable and repeatable data for refractive measurements and keratometry.

AR Measurements
Spherical power -20.00 D - +23.00 D (VD= 12 mm)
Cylindrical power 0D - +/-12.00D
Cylinder axis 0 �“ 180 degrees
Minimum pupil dia. 2.5 mm
Target fixation Auto-fogging system
Corneal curvature 5.00 mm �“ 13.00 mm
Corneal astigmatism 0D - +/-12.00D
Corneal axis 0 �“ 180 degrees
PD Measurement 30mm �“ 85mm
Power source 100/120 VAC 50/60 Hz - 220/240 VAC 50/60 Hz
Dims. & Weight 260 (W) x 485 (D) x 456 (H) 45lbs.

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