Visionix VX36 - How Do I Measure PD and PH; How Do I Measure UV Transmittance, and Blue Light Measurment; How Do I Mark Lenses

Vx36 User manuel Page | 37
6.8 How do I measure PD and PH?
• Select the Lens mode by pressing the Lens mode button at the top right of the right toolbar
on the main screen.
• Place the framed lens on the support.
• Make sure the nose piece is fixed when taking the measurement.
• Proceed to alignment
In automatic mode
• The reading is automatically acquired and help
In manual mode
• Press the measurement button located on the front of the VX36, to hold and store the measured data.
Note: in order to be more accurate, move the left and right lens towards the same direction during alignment.
• Note: for low astigmatism lens, it is preferable to use the “manual reading” and make the prism power
IO, UD as small as possible.
• The result is displayed below the measurement area, refer to the Lens Mode section.
• Print out the results, refer to the How do I print out results? Section.
6.9 How do I measure UV transmittance, and blue light
measurment?
The percent transmittance of light in the ultraviolet portion of the spectrum (wavelength= 365nm) is shown in
a bar graph.
• Place the lens on the support.
• Select the UV mode, by pressing the UV button at the Right
• Make sure the lens is aligned
• Press the measurement button on the front of the vx36 (the automatic mode is displayed).
Note: when no lens is present, the bar graph indicate 100% transmittance (no blockage of the UV light).
6.10 How do I mark lenses?
The marking device places three marks on the lens, causing the pens to descend and mark the lens surface
• Place the lens on the support.
• Turn and press down on the marking lever, causing the pens to descend and mark the lens surface.
• Carefully release the marking lever, so it will return to its initial position by its spring force.