OPTIKON Keratron Piccolo, Инструкция по установке и эксплуатации

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Keratron
™
Piccolo Installation and operating manual
OPTIKON 2000
7.2 CALIBRATION
To ensure accurate measures, you are suggested to do the Keratron
™
Piccolo
calibration often. . In particular:
•
After any transportation or installation;
•
After any Mires Cone removal and change;
•
On a periodical base (e.g.: daily or after each turn on) depending on use.
To run the calibration:
•
Check, that the sphere radius saved into the PC matches the one reported on
the back of the calibration sphere itself. If no, then set it into the Calibrate
menu (just the first time after installation).
•
Start the calibration from the menu or the Calibrate … button on the PC
screen
•
Press either OD or OS on the VK to start the acquisition
•
Hold the body of the calibration sphere between the thumb and the third finger,
and fit it well and steady onto the mires cone.
•
Turn the back knob by the second finger, until the sphere vertex turns the OK
LED on. Turn slightly back and forth so to be sure to be in the middle of the
OK zone
•
Press the footswitch and wait that the image is transferred to the PC. Then the
software will ask the operator to verify that there are no traces of dust or spots
on the sphere that was acquired. Following confirmation, the software will first
find the center and then reconstruct the rings, asking the user to confirm
whether the mires where traced correctly.
•
If the software is unable to automatically find the center, repeat the procedure
from the beginning, paying particular attention that the sphere is clean and is
correctly centered during acquisition.
7.3 HOW TO ACQUIRE A GOOD IMAGE
In topography, the most critical operation is the acquisition of an image. You must be
careful to capture an image by always moving slowly until you have reached the
proper distance from the corneal apex , , and avoid lacrimation and
artifacts due to
the presence of eyelashes .
An automatic focusing device located on the cone apex lets you capture images only
if the eye vertex is at a correct working distance, provided the eyelashes do no
interfere.
Cod. 161301EN 7-2
2012-01-17
Rev.D