TruForm Optics
Lenses > Presbyopic Designs > Prefix II Multifocal
Prefix II Multifocal
Prefix II Fitting Guide (PDF)
Design
- Progressive, aspheric multifocal
- Simultaneous distance and near vision delivered through the back surface aspheric design
- Center of the lens provides distance vision while near vision is delivered through the mid-periphery
Candidates
- Previously adapted GP contact lens wearers
- Current GP lens wearer whose lenses are fit with a superior lid attachment
- Patients with less than 3.00D of corneal cylinder
- Individuals with at least an 8mm vertical palpebral fissure
- Patients who have strong distance and midrange vision demands will do well with this lens design while those with a stronger need for near vision may do better with the SolitaireThin or LlevationsThin lens designs
Lens Parameters
- Base curves: made to order
- Distance powers: made to order
- Near powers: made to order
- Diameters: 8.3mm to 12.0mm
- Materials: any
Fitting
- The Prefix II Multifocal can be ordered empirically with the nomogram provided by TruForm Optics or with Ks and Rx through the fitting consultants