Orthokeratology fitting with profilometry

Real topographical data of the peripheral cornea is the cornerstone to achieving first lens fit success. It is the most critical factor for successful lens alignment and lens centration.

The Eye Surface Profiler (ESP) offers the precise limbus-to-limbus topography required for successful OrthoK fitting.

The ESP has revolutionized the way scleral lenses are fit. The same precision can now be applied to OrthoK fitting.

OrthoK clinical application with the ESP

The Eye Surface Profiler (ESP) offers an OrthoK module to fit and provide precise follow-up care for orthoK patients.

Easy and fast measurement process
Complete limbus-to-limbus coverage
Algorithms for prediction of the initial lens
Intuitive software for patient follow-up

If you want to see a demo of the application, you can request one here.

OrthoK Fitting Guide with the ESP

Initial visit:

MAKE A MEASUREMENT
Use the ESP to get a scan of the complete cornea, limbus to limbus.
SAVE THE SCAN AS BASELINE
Remember that these baseline scans are the most important as these will be used for your comparisons to treatment maps going forward.
SELECT LENS DESIGN
Go to the First Lens Fit OrthoK tab and select the Supplier and Lens you want to design. Click on Calculate and all the first lens parameters will be calculated, including the lens diameter based on the HVID value.

Follow up:

MAKE A FOLLOW UP MEASUREMENT
Use the ESP to get a follow up scan of the complete cornea.
ASSES LENS FITTING
Use the automatic generated difference maps to compare the follow up maps to the baseline scans: | Axial curvature and Power profile maps give you data about the change in corneal power (Figure 1 & 2). | Tangential curvature map shows you the lens position and is most helpful to evaluate lens centration (Figure 3).

LEARN FROM THE EXPERTS ABOUT FITTING ORTHOK WITH PROFILOMETRY

CASE REPORTS:

Videos and webinars:

DirectConnect with Paragon CRT

Profilometry-based OrthoK fitting

DirectConnect with WAVE

Overnight orthokeratology (orthok)

OrthoK is a well-established non-surgical solution for patients with myopia, using reverse-geometry, rigid contact lenses for the temporary correction of refractive error. Wearing specially designed contact lens overnight, the corneal curvature is reshaped to improve vision during the day.

On-label orthokeratology prescribing is typically for patients with myopia up to -6.00D and less than 1.75D of astigmatism. OrthoK fitting regimens overcorrect patients by different compression factors (Jessen Factors) since the treatment is known to regress over the course of the day.

OrthoK for myopia management

Myopia is also called ‘nearsightedness’ but it is much more than that, it is a chronic and progressive disease. Myopia poses the biggest eye health threat of the 21st century and it is projected that by 2050 almost half of the world’s population will suffer from myopia, with nearly one billion people expected to have high myopia.

Children under 12 diagnosed with myopia are at greater risk of developing high myopia, which may lead to sight threatening disease later in life. Numerous studies have reported the efficacy of orthoK treatment option to control myopia: overnight orthokeratology is effective in slowing myopia progression.