We’re always talking about how Autorefraction has changed little since its inception; an infrared light and a screen and a cheap printer that spits out some semi-accurate numbers seems to be all it ever is. But the ARK-530A from NIDEK (Marco) seems to have been the instrument that brought Autorefraction out of the dark ages– a huge upgrade even from their own older models (NIDEK 700A anyone?). It’s innovatively superior from most in its class thanks to all new 3D auto-tracking, Pupil Zone imaging methods, greater CCD image quality, and impossibly wide measurement range. The 530A also gives us a beautiful new 5.7″ touch LCD screen, motorized chin-rest, auto-cut printer, easy EHR abilities, and easy capture on nearly every Pupil size; did we also mention its also pretty? Using the 530A in clinical settings lent us a newfound confidence in objective ARK data thanks to a nearly 4.0mm corneal measurement area and an upgraded CCD camera powered by an SLD light that greatly improves actual image quality–even on tougher patients with cataract/IOLs. It also acquires Ks using the traditional method (mire rings) AND peripheral measurements (up to four points) which, from our observations lent more consistent and accurate Keratometric results. It’s not only accurate/consistent on the ideal patient, yet most all (elderly, IOL, cataract, etc…) patients thanks to a minimum pupil size of just 2.00mm, and a nearly impossibly wide spherical measurement range of -30D. Thus it’s accurate, innovative, sleek- and we wish we could leave it there… our only knit picky objection to the 530A’s operation comes by the its auto-tracking 3D functionality seeming to be a bit overbearing at times- thinking it knows best even when it struggling to align itself automatically. We like the idea of auto-tracking, but it seems to still require the operator’s interference, and the on-screen instructions attempting to guide the operator can be less than intuitive at times. We found ourselves preferring manual operation, most of the time.
OUR TAKE: Innovatively impressive, accurate, and consistent on a large population scale; a big upgrade from what your parents used. 3D auto-tracking can be annoying for the novice user.
The NIDEK ARK-530A / 510A adopts the advanced Pupil Zone Imaging Method for refraction measurement, which analyzes a wider area (Max. ø4 mm) to obtain more reliable and realistic data that is closer to manifest refraction.
The ARK-530A / 510A uses the SLD (Super Luminescent Diode)and highly sensitive CCD device for improved image quality. The image with the SLD is sharper and clearer than those with the LED, and the system offers greatly improved measurement capability even with dense cataract and IOL implanted eyes.
The ARK-530A / 510A also offers high accuracy in keratometry measurement.
The system provides ordinary measurement (ø3.3 mm) using a mire ring, and also peripheral measurement (ø6 mm) using 4 points, both of which offer reliable and accurate keratometry data. The ARK-530A / 510A uses double mire rings for better alignment and observation.
The ARK-530A / 510A offers the widest measurement range of -30 to +25D.
The ARK-530A / 510A can measure small pupils down to 2 mm in diameter, allowing wider application.
The auto-alignment (X, Y & Z directions), auto- focusing (Z direction) and auto-shooting provide faster, simpler and more accurate measurements. When alignment is performed correctly, measurement starts automatically.
Clear image and data display with user- friendly guidance allow easier and more reliable operation.
The clear 5.7-inch color LCD with tilting function offers easy operation even for a standing operator.
A virtual comparison between patients’ current vision (with the unaided eye or with glasses*) and AR-corrected vision can be easily demonstrated.
*Requires data transfer from a NIDEK auto lensmeter.
The ARK-530A incorporates a high speed and user-friendly printer, and the printer paper can be changed easily. Printed data sheet will be cut by the auto cutter for quick and easy detachment
The desired data, such as the AR value, PD and confidence coefficient, as well as an eyeprint for documenting patient treatment, can be selected and printed out.
The ARK-530A incorporates the card slot for EyeCare Card system, which provides quick and easy wireless data transfer. The card is not included and can be purchased separately.
The main body/optical head can be fixed with the advanced one-touch lock– no more twisting to ensure safe transport.
The NIDEK 530A offers 3D tracking on each axis (X, Y, Z axis) whereas the NIDEK 510A only allows X, Y axis.