Zeiss HUMPHREY 720i User Manual page 61

SETTING-UP TESTS
REV. B 02/03 PN 51680-1
2
Choose CALCULATE
TRIAL LENS.
3
For the right eye, select
SPHERE.
If you have not entered the
patient's date of birth, enter it at
this screen by pressing DATE OF
BIRTH. The trial lens cannot be
calculated without this patient
information.
4
Input the patient's distance
sphere correction. Always
remember to enter a plus (+)
or minus (-) as the first
character. Press ENTER.
If the patient has no sphere
correction (plano), you must
enter zero (0) for the proper
trial lens calculation to be made.
5
Enter correction for cylinder and axis, if needed.
HUMPHREY FIELD ANALYZER II -
3-11
i
series