High Plus Options

Frame Selection Tips

On a high plus lens, care must be taken in selecting a proper frame. There are three guidelines that we recommend following in frame selection.

  1. Frame PD is within 4 mm of PD. Minimizing decentration is important with high plus RX’s. Too much decentration causes unnecessary nasal thickness, and it serves no purpose.
  2. Frame B measurement is greater than 70% of the A measurement. On this type of RX, a very narrow frame accentuates the thickness at the top and bottom of the frame.
  3. Frame doesn’t have sharp corners. The corners create an area with drastic thickness changes on the finished glasses, making the lenses look thicker. An oval or round shape is preferable.

Is the patient monocular?

If the patient only has one good eye, consider putting the lens on center (disregard the PD). Often, the compromise in optics is miniscule compared to the aesthetic benefit.

Importance of Lens Curvature

Back to Top

We can make some beautiful high-plus lenses using the shapes outlined below. To do this, we change the lens curves through a process called freeform lenticularization. Some patients are very sensitive to these changes in curvature. If you have a patient who you feel would be sensitive to these changes, we wouldn’t recommend straying from their current eyeglass lens design.

Standard Shapes

Back to Top

Shape #10: Standard

Fixed front and back curve, no lenticularization or asphericity.

Shape 10


Shape #11: Lenticular

A high base curve “bowl” on a flatter carrier lens. Can be done free-form or using standard semi-finished lenses.

shape 11

 

Lenticularized Shapes

Back to Top


Shape #12:
HD Supermodular

 

A free-form version of aspheric supermodular cataract lenses

shape 12



Shape #13:  
Backside Supermodular

 

A free-form backside aspheric lens. Best for lenses where the front side of the lens cannot be altered(polarized lenses, Transitions)

shape 13


Shape #14:
2 Side Supermodular

 

Free-form aspheric curves cut into both sides of the lens. This is the thinnest lens design available

shape 14


Shape #15: 

Aspheric Wrap

 

A free-form aspheric lens optimized for wrap sunglass frames

shape 15