The Marco ARK-530A Autorefractor Keratometer is an objective automatic Refractor/Keratometer featuring SLD (Super Luminescent Diode) making measurements for cataracts and IOLs possible. The Marco ARK-530A Autorefractor Keratometer also utilizes zonal ring image method combined with the most sensitive CCD. The Marco ARK-530A is fully automated when aligning, tracking, and focusing on the patient’s eye which insures the most reliable and repeatable data for refractive and keratometry measurements. The Marco ARK-530A Autorefractor Keratometer allows the operator to take peripheral keratometric measurements including sagittal radius and eccentricity values used in corneal evaluations for contact lens fitting and refractive surgery evaluations.