Checking Calibration - Zeiss Acuitus 5000 User Manual

6. Gently push the printer back into place until it stops. Then return the printer lever on the side of the
instrument to the lock position. Push the printer all the way in.
7. Press the Print button to test.

Checking Calibration

The calibration on the Humphrey Acuitus is very stable. However, calibration can be affected if the
instrument is moved with the optics head unlocked, or if it is bumped or tipped. It is a good idea to check
calibration once a week and after every time the instrument is moved.
Your Acuitus Accessory Kit includes a "test eye" piece that simulates a human eye with known
measurements. To use this test eye piece to check the your refractor's calibration:
1. Note the reference values marked on the test eye piece.
2. Attach the test eye assembly to the forehead rest by inserting the tabs into the slots on the forehead rest
and pushing down.
3. Align the test eye in the monitor by moving the joystick as you do for a refraction.
4. Press the button on the top of the joystick to take a measurement if you are using manual mode. In
automatic mode, the Acuitus will measure the test eye and display the results as soon as the test eye is
aligned.
Test eye
5. Check to make sure that the measured values correspond with those marked on the test eye piece.
Zeiss Humphrey Systems Acuitus User Manual
PN 50648 Rev A June 2001
17