Paragon CRT Dual Axis User Manual

• Failure to center or complete treatment with a spherical Paragon CRT® lens
using suggested parameter changes
• Decentered treatment zone on follow up with an otherwise best-t Paragon
CRT® lens
Dierences of 30 microns are sucient to cause exure, decentration, and
undertreatment due to weakened circumferential attraction between the landing
zone of the lens and the peripheral cornea. Consider use of the two RZD dierence
(50-micron) design when these indicators are present.
e indication of the Paragon CRT Dual Axis® design is conrmed if the treatment
zone becomes more circular, exure is eliminated, lens centration is improved,
circumferential landing is observed, and the targeted treatment is achieved.
For additional information on Paragon CRT Dual Axis
®
,
please call your Authorized CRT Laboratory Consultant,
or Paragon Consultation at: 800-528-8279 option 2.
ZQF100013E - 11/17
1. Anderson D. Map out Your Lens Fitting. Optom Manag 2008 Oct; 43(10): 26-30
2. Anderson D, Kojima R. Understanding and Applying Corneal Topography. Rev Cornea & Contact Lenses 2007 Sept: 22-27
3. Caroline P, Andre M. Not All Astigmatism is Created Equal. CL Spectrum 2009 Apr: 24(4):56
4. Caroline P, Andre M. Elevating Our Knowledge of the Corneal Surface. CL Spectrum 2001 Apr; 16(4):56
5. Roberts C. A Practical Guide to the Interpretation of Corneal Topography. CL Spectrum 1998 Mar: 13(3):25-33
DUAL
AXIS
®
CRT

Paragon CRT Dual Axis Specifications

General

Brand	Paragon
Model	CRT Dual Axis
Category	Medical Equipment
Language	English