Contex MF-19™ Lens (Multifocal)
See Near, Far, and In-Between
• +1.75 ADD Power
• Up to +2.25 ADD with Front Aspheric
• Crisp, Sharp Distance Vision
• Excellent for Previous Gas Perm Wearers
See Near, Far, and In-Between
• +1.75 ADD Power
• Up to +2.25 ADD with Front Aspheric
• Crisp, Sharp Distance Vision
• Excellent for Previous Gas Perm Wearers
Select patients with a +2.50 or less ADD power. Take central K readings, refraction, and topography if available. Determine which is the non-dominant eye. To increase the ADD power, over-plus the dominant eye by +.25 and the non-dominant eye by +.50 on early presbyopes, and up to +1.00 or more for advanced presbyopes.
Assuming you have achieved a good fit that translates well and you have pushed the plus as much as possible in both eyes, then you may need to add a front reverse aspheric curve to boost the ADD power. Order an e-.5 front surface to boost the “ADD” power by about +.50.
If Indicated Lens is Too Tight:
Flatten the Base Curve by ½ diopter
If Indicated Lens is Too Loose:
Steepen the Base Curve by ½ diopter
Example:
CK’s: R: 43.00/44.00 (Dom) Spectacle-Rx: -3.00 Eccentricity Value = .52
L: 44.00/46.00 (Non-Dom) Spectacle-Rx: -3.00 Eccentricity Value = .48
R: Suggested Base Curve: 7.38 Dominant Distance Power: -5.50
L: Suggested Base Curve: 7.22 Non-Dom Distance Power: -5.25
Download the Contex MF-19™ Quick Fit Guide. Download PDF
Download the Contex MF-19™ Presentation. Download PDF
Or please contact one of our knowledgeable consultants.