OCULUS Keratograph 5M - Adjust Illumination: [Illumination] Groupbox; Adjusting Magnification: Magnification Changer Groupbox

19 Performing extended examinations: JENVIS Pro Dry Eye Report (optional)
Instruction Manual Keratograph 5M (G/77000/XXXX/EN – Rev05) 71 / 106
19.3.2 Adjust Illumination: [Illumination] groupbox
 Activate the desired radio button.
IR-Top/IR-Central: If only the “IR-Top” and “IR-Central” checkboxes are
enabled (in a darkened room):
The fit of the contact lens can be evaluated with the pupil dilated (e.g.
for fitting multi-focal lenses).
Blue: The blue light is used for excitation of the fluorescine to fluores-
cence.
White: TF-Dynamic: Two spots in the bottom segment of the Placido
bowl are set to white.
Placido White: Topography and NIKBUT examination: The illumination
of the Placido bowl is set to white.
Placido IR: The lighting of the Placido bowl is set to infrared.
Inner Ring: The patient’s eye is subjected to minimal glare.
Fixation Used to assist the patient’s fixation.
[Keratometer] checkbox: Keratometry marks for aligning the topogra-
phy
19.3.3 Adjusting magnification: Magnification Changer groupbox
You can set the magnification in this groupbox. You have a choice of
three optical and two digital zooms.
 0.5 to 1.4
 2.0 (digital)
 2.8 (digital)
 1.0 low aperture, for greater depth of field
 1.0 yellow filter, for images taken with fluorescine
If your device is equipped with a wireless joystick, you can use the joy-
stick to trigger different images.