UltraHealth and UltraHealth FC are made from our tried and tested, proprietary, RGP and silicone hydrogel materials bound permanently together. The patented unbreakable Hyperbond® junction, removes the issues of the past of low DKs, fragile lenses of the past.
Empirical fitting for the irregular cornea
Whilst the Duette and SynergEyes iD have, for many years now, been fitted empirically from Ks, HVID and manifest refraction the lenses for irregular eyes have traditionally used fitting sets. During the recent pandemic this became difficult, if not impossible, and so we developed the means to fit an irregular cornea empirically using topography!
From this information along with the all-important map we can calculate the sag of the cornea and therefore the amount of vault required.
For the prescription itself we are best served with a previous rigid lens BOZR and power (plus any over-refraction) so we can work out comparative tear lens profiles. However, we can work the prescription from the spectacle Rx but this sometimes needs a small change depending on the size and position of the ectasia.
In our next post, we will give you more information on the design, fitting and handling of these lenses. In the meantime, if you would like any more information, feel free to contact Professional Services here.