- Keratoconus or other cases of central corneal ectasia consequent to corneal graft, PRK, LASIK or trauma.
- When alternative GP designs will not center or cause intolerable bearing forces on the central cornea
- Bi-surface aspheric design: both the anterior and posterior surfaces are aspheric.
Posterior surface made up of 4 zones to conform to the shape of the conic cornea:
- First (base) and second zones address the ectasia
- Third and fourth zones form the peripheral curve system, allowing an alignment fit over the non-ectatic cornea and a comfortable edge lift.
- Adjust any of the 4 Zones to closely contour the cornea and provide optimum edge lift.
Pressure points reduced because the bearing forces are distributed over a larger area, resulting in:
- Better comfort
- Better centration
- Aspheric anterior surface computed with goal to eliminate induced aberrations.
- Large optical zones designed to provide better vision and reduce glare.
- Available in keratoglobus and pellucid marginal degeneration designs.
- Standard diameters: 9.6 mm and10.4 mm (diameters from 8.8 to 12.5 mm also available).
- Made in advanced polymer materials exhibiting excellent oxygen permeability and wettability.
8.8 to 12.5 mm
(9.6 mm, 10.4 mm, 11.0 mm standard)
|Powers||Manufactured To Order|
|Fitting Sets||14 lens: 44 D to 70 D|
|Standard||Central Steep Zone||Typical (mild or advanced)|
|Globus||Large sagittal depth||Ectasia of most of cornea|
Our guarantee: All lenses are manufactured to specification and free from defects.
Diagnostic Lens Fitting Method
Apply trial lens with BC closest to steepest K-reading.
- If K-readings are not available or reliable, select the 56 D lens.
- Flat lens will show heavy central touch—select steeper BC.
- Steep lens will show excessive vault—select flatter lens.
- Optimal BC will show light touch or slight vault.
- Over-refract and order final lens power.
- Evaluate edge lift and order in standardized steps—flatter or steeper—to provide optimum peripheral fit.