Frequently Asked Questions

Euclid Ortho-K lenses are a brand of rigid, oxygen-permeable lenses for the temporary reduction of myopia. This patient-specific lens is to be worn overnight to gently reshape your patients’ corneas as they sleep. This reshaping is designed to provide clear daytime vision, free of glasses and contact lenses.

• There are several studies demonstrating the effectiveness and safety of orthokeratology.^1-8

• Our Emerald and MAX product lines are manufactured only in materials that have U.S. FDA overnight wear approvals.* Euclid lenses have years of successful use by eyecare professionals around the world.
^{*Some products are only available in certain markets.}

This modern treatment is safe,³ effective, FDA-approved, and proven on over 2 million eyes around the world.

Euclid is the world’s most researched Ortho-K design for myopia.⁹ Designed to fit the exact shape of your patient’s eye, there are no trial sets and no guesswork; simply provide your patient’s keratometry readings, refraction, and HVID (Horizontal Visible Iris Diameter), and our advanced algorithms will calculate the exact lens needed to fit your patient and correct their vision.

There are unique advantages of our proprietary lens designs:

• Multi-Curve Design gently aligns the peripheral cornea, offering better centration for a close, comfortable fit.
• Optimized Treatment Zone – the advanced algorithm results in a treatment zone based on each patient’s Rx and corneal shape.
• Elevation adjustments for astigmatic patients – limbus to limbus corneal elevation differences are easily incorporated into Euclid’s proven Toric design.

Euclid lenses are approved for the temporary reduction of myopia up to -5.00D and astigmatism up to -1.50DC. FDA Approved (PMA #P040029).

Euclid lenses can be worn by anyone regardless of age, and all patients can experience the benefit of clear sight during the day. However, studies have shown that myopia generally manifests between the ages of 8-12, so it is recommended that young patients are fit between those ages for the best management of their myopia. Starting a myopia management program at any time during the growth years (8-23 years of age) can still have great benefits.^10-23

Unlike some Ortho-K brands, Euclid lenses do not require a trial set to achieve a successful fit. Provide accurate keratometry readings, sphero-cylindrical refraction, and HVID (Horizontal Visible Iris Diameter), and we will make lenses fit to the shape of your patient’s eyes. A baseline corneal topography is also recommended prior to starting any Ortho-K procedure.

While a topographer is not required to order your first lenses, it does provide a critical piece of information that will be useful for any consultation work if any fit issues arise. Topography is also recommended to determine when we may need to choose the best design option between the Euclid (sphere) and Euclid Toric lens.

Many eye care professionals will tell you that Euclid lenses are easy to incorporate into your practice, saving you chair time and giving you great first fit success. Euclid Vision Corporation also provides access to a consultation team of experienced Ortho-K specialists ready to help you. Call 1.800.477.9396 or email consulation@euclidvision.com at your convenience and we’ll ensure that your Euclid lenses provide you and your patients optimum results.

Since there is no trial set required to fit Euclid Ortho-K lenses, there is no upfront cost other than the cost of the lenses themselves. Additionally, our practice-friendly warranties will help you and your patients feel comfortable beginning the Ortho-K process.

Euclid Ortho-K lenses are all FDA-approved and have been shown to be safe and effective in several research studies.^1-2,15,18 Each pair of lenses comes with an authorized package insert that includes safety information for the product.

Corneal astigmatism often will cause a lens to decenter in the closed eye. Euclid lenses are designed and approved to fit patients with up to -1.50D cylinder.* Euclid Toric lenses can improve centration and alignment in patients whose topography shows limbus-to-limbus “bow tie” pattern and/or over 25 microns of sagittal height difference between primary meridians at the 8 mm chord. Talk to a Euclid specialty lens consultant today to determine if a Euclid Toric design is indicated for your patient.

^{*Euclid Ortho-K is not indicated for the treatment of astigmatism.}

• Orthokeratology is an in-demand eyecare specialty.

• Euclid lenses may help generate referrals for your practice.

• Offering Euclid Ortho-K lenses in your practice may help bring patients in at an early age.

• Patients can’t buy Euclid lenses online.

• Offering Euclid lenses can help you foster long-term patient loyalty.

• No initial trial lens investment.

All eyecare professionals must start by taking the FDA-required online Euclid certification test (www.geteuclidcertified.com).
^{*Certification requirement is only applicable to the US market.}

After you pass the FDA-required* certification test, a certificate of completion is available for download and you can request to open an account with Euclid. A representative from Euclid will reach out to you to answer questions and provide access to valuable promotional & educational materials. Then it’s time to tell your staff about this exciting treatment process and how you expect Euclid Ortho-K will be presented to patients throughout your office.
^{*Certification requirement is only applicable to the US market.}

Euclid lenses can be made in two materials, both of which are fully approved by the FDA for overnight Ortho-K. Tisilfocon A offers outstanding material characteristics and a Dk of 180. Oprifocon A has a proven history of Ortho-K use, and a Dk of 85. Both materials are available in green and blue tints.

Every Euclid lens has a laser mark identifier on the edge, which is a unique number. That number will only ever be used once, and can be used to identify the exact patient, eye, and order entered into our system. For easy at-home lens identification, Euclid recommends using green on the right and blue on the left.