There are a few possibilities here; let’s go from easiest to fix, to hardest:
• There could be dust between the camera and eyepiece.
Please remove the phone and use compressed air to blow any dust away from lens of the eyepiece (note: do not shake can or hold any way but vertically upward)
• The microscope could be out of focus when the analysis begins.
Please be sure that the sample is in good focus before you start the analysis.
• The phase rings are out of alignment.
To check this, please refer to “Phase Ring Alignment” procedure in the User Guide.
• The sample surface is uneven beyond the range that xR Fiber can accommodate.
If given the “Inconsistent Slide” pop up menu, you can bring the sample into good focus and select continue if you believe the sample is still readable by the unit, or you can cancel the sample and read it manually, as you choose.