<img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=1410584789237759&amp;ev=PageView&amp;noscript=1">

Benefits of Empirical Fitting

Visual Clarity of a GP Lens

Hybrid lenses offer crisp GP optics, stable vision not affected by lens rotation1, delivering great vision for patients.  Empirical fitting of hybrid lenses is now available for patients with astigmatism, presbyopia, keratoconus or other irregular cornea conditions.  SynergEyes iD, UltraHealth, SynergEyes KC, SynergEyes A, Duette and Duette Progressive hybrid lenses can all be fit empirically.  

With empirical fitting, patients have a wearable first lens experience that showcases the exceptional visual qualities of the hybrid lens from the start.  



Empirical fitting of hybrid lenses can bring increased efficiency to your practice by saving valuable chair time, streamlining the fitting process, reducing reliance on reusable fit sets (with the associated maintenance that they require), and eliminating physical application of trial lenses on patients.  Empirical fitting removes the need to disinfect and reuse a diagnostic lens and replaces it with a technology-driven, custom design.  SynergEyes has developed a proprietary algorithm that determines the unique lens to manufacture for each patient, using accurate patient measurements.


Revenue Retention

SynergEyes hybrid lenses are available exclusively through Independent ECPs (not online or through mass merchandisers), providing an opportunity for practice differentiation and recaptured revenue. Practitioners retain 100% of their revenue and profitability from their hybrid patient care.

1. GP optics negate corneal astigmatism; rotation of lens inconsequential.

How to Empirically Prescribe SynergEyes iD

Hybrid Contact Lenses

SynergEyes iD hybrid lenses are individually designed to each patient’s unique ocular anatomy. The fitting is straightforward, utilizing Keratometric readings, HVID and Refraction to personalize precise lens parameters. There is no need to choose between fixed skirt or base curve options; a patient’s unique corneal diameter and curvature drive the specific lens design, with new linear skirts following the linear shape of the sclera. The multifocal lens is powered by a proprietary Extended Depth of Focus (EDOF) design from the Brien Holden Vision Institute, and proven multifocal optics provide patients with a clear visual experience that smoothly transitions through all distances.

To empirically order SynergEyes iD:


The SynergEyes Empirical Lens Calculator can be used to help select the initial lens.

How to Empirically Prescribe UltraHealth

Hybrid Contact Lenses

Hybrid contact lens options that can be prescribed empirically for patients with keratoconus include SynergEyes KC and UltraHealth. 

UltraHealth lenses are the most advanced hybrid lens.  While indicated for keratoconus, the 'Continuum of Care' sweetspot is for patients with mild to moderate keratoconus.  UltraHealth is designed to vault the corneal ectasia, providing well-centered, gas permeable vision along with comfort from the soft skirt.

To Place an Empirical Order:

Provide a topography (PDF or raw data) with the following information to a SynergEyes Technical Consultant:

  1. Keratometry readings
  2. Eccentricity data, often listed as e, e2, CEI,
    Shape Factor, or Q value
  3. HVID
  4. For power, provide previous RGP or scleral data with
    base curve and over-refraction.

Using the data listed above, a recommended lens will be ordered. 

Screenshot 2019-05-23 at 4.38.08 PM

Read More About UltraHealth Empirical Fitting

Download Empirical Design Instructions Now_a

Other Resources

Specialty Fitting in a New Age

by Louise A. Sclafani, OD, FAAO, FSLS

New disinfecting protocol by the ISO was introduced at the American Academy of Optometry in 2019, and at the GSLS in 2020 at the height of the COVID pandemic. These new standards highlighted how crucial it is to have alternative ways to accurately fit patients for specialty lenses without the need to physically fit the lens on a patient.  Empirical fitting capabilities not only adhere to these standards with ease, but provide a customized fit which results in a better wearing experience for the patient.


SynergEyes iD Hybrid Lens

“I like the empirical ordering process. I like how the patient thinks it’s very easy to insert with great distance vision and comfort”

Nhi P. OD

UltraHealth Hybrid Lens

“The UltraHealth lens is a great option for those mild to moderate cones who want great vision, good comfort and who need that excellent centration. It’s a fantastic lens option for those patients.”

Jennifer Harthan OD, FAAO, FSLS