Marco, Nidek ARK-500A

NIDEK ARK-500A Autorefractor Keratometer
The ARK-500A is provided with an auto-tracking mechanism that
achieves alignment in the up and down direction.
An auto shooting function is provided; measurements take
place automatically when the device is best aligned and focused.
A moterized up and down chin rest allows the operator to easily adjust
the height of the chinrest.
A built in RS-232C interface allows data export to computers and such.
A view comparison function and
measurement ring image display function are provided.