Paragon CRT Dual Axis User Manual

• between 25 to 30 microns, consider prescribing a one-step (25-micron)
increase in RZD.
• between 31 to 60 microns, consider prescribing a two-step (50-micron) RZD
dierence.
• between 60 to 90 microns, consider prescribing a three-step (75-micron)
RZD dierence.
• > 90 microns, consider prescribing a four-step (100-micron) RZD dierence.
e average elevation dierences are calculated using this best t sphere example:
A standard two 25-micron step (50-micron) dierence in the RZD, 90 degrees
apart is oered to compensate for dierences in peripheral corneal elevation. e
recommended method of tting is to continue the use of the RZD suggested by the
Initial Lens Selector (ex: 550) and observed to provide the recommended uorescein
pattern. (Image C) is RZD continues to be recommended for the at meridian
with the respective higher peripheral elevation. An RZD increase of 50 microns
(two 25-micron steps) is recommended for the steep meridian with the lower or
shallower peripheral elevation. (Image D) In this case, no change is recommended
in the LZA. e LZA will remain constant circumferentially. Some eyes may
Image A Image B
Image C

Paragon CRT Dual Axis Specifications

General

Brand	Paragon
Model	CRT Dual Axis
Category	Medical Equipment
Language	English