What is Orthocyl? A Pioneering Solution for High Astigmatism Treatment and Myopia Control

Orthocyl is a special type of rigid contact lens designed by Dr. Liberty Hai Ho Nguyen and patented in the United States. This represents a significant breakthrough in the field of refractive error control, especially for patients with high astigmatism – a group that previously had very few effective treatment options.

How much high astigmatism can Orthocyl treat?

Unlike conventional Ortho-K designs, Orthocyl can correct astigmatism up to –4.00 diopters. With its specialized mechanism, the lens not only improves daytime vision but also enhances myopia control, delivering long-term benefits for users. Orthocyl has been clinically proven to correct astigmatism up to –4.00 D – a figure that surpasses many standard Ortho-K lenses. This offers patients with high astigmatism more opportunities to improve their vision and reduce dependence on spectacles or surgery.

Key Features of Orthocyl Lenses

• Superior centration stability

  • The lens adheres stably to the cornea, reducing decentration.

  • It ensures the treatment zone operates accurately, enhancing visual quality.

• Multi-zone design — especially a 5.5 mm treatment zone

  • A 5.5 mm treatment zone helps light converge uniformly and delivers crisp vision.

  • It reduces halo and glare effects when looking at lights at night.

  • Optimizes effectiveness in controlling myopia progression.

• Larger tear reservoir in the lens

  • Forms a cushioning layer that protects the cornea and increases comfort during wear.

  • Reduces dryness and lowers the risk of irritation with long-term use.

• High oxygen permeability — up to 200 DK

  • Ensures the cornea receives enough oxygen when wearing the lens overnight.

  • Supports safe treatment and minimizes complications from hypoxia.

• Customized design based on individual corneal parameters

  • Each Orthocyl lens is designed based on the unique corneal shape of the patient.

  • Provides maximum comfort while achieving optimal treatment effectiveness.

Dr. Liberty Hai Ho Nguyen – The Pioneer Who Brought Ortho-K to Vietnam

Dr. Liberty Hai Ho Nguyen is a leading expert in Asia in the fields of Ortho-K and myopia control, with over 15 years of experience in research, teaching, and clinical application. With his vision and dedication, he has helped hundreds of thousands of Vietnamese children and parents access modern myopia-control solutions that are already established in the U.S., Japan… and many advanced countries.

Through years of research and clinical implementation, he has obtained two international patents:

• U.S. Ortho-K patent — USPTO Patent No. 10,725,321

• A patent for an Ortho-K method treating high astigmatism – marking a significant step forward in treating severe astigmatism and controlling myopia.

Read more: Patent for the Ortho-K method in treating high astigmatism – USPTO Patent No. US 11,650,432 B2 HERE

Read more: Ortho-K Patent in the United States – USPTO Patent No. US 10,725,321 B1 HERE

These research works not only affirm Dr. Hai’s international impact but also bring practical benefits to thousands of patients in Vietnam and across the world. Thanks to his pioneering efforts, Ortho-K Vietnam has become one of the trusted myopia-control methods in Vietnam, helping hundreds of thousands of children slow myopia progression and preserve lasting healthy vision.

Currently, Orthocyl and other Ortho-K lens lines distributed by Ortho-K Vietnam are approved by the U.S. Food and Drug Administration (FDA) for safety and efficacy in refractive error treatment. These lenses have been shown to improve daytime vision while supporting myopia progression control in children and adolescents.
FDA recognition demonstrates that Ortho-K is a clinically proven, safe, and reliable treatment method, offering an optimal alternative for patients seeking to treat myopia and astigmatism without surgery.

How to check FDA (U.S.) approval for Ortho-K lens products:

Step 1: Visit the link: https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfRL/rl.cfm

Step 2: In the field “Establishment or Trade Name”, enter “CLER VISION” and then click “SEARCH.”

Orthocyl — A Comprehensive Solution for High Astigmatism and Progressive Myopia

With the ability to correct up to –4.00 D astigmatism, a 5.5 mm treatment zone, 200 DK oxygen permeability, and a fully customized design, Orthocyl is emerging as a leading choice in refractive error control. It is a safe, effective, and innovative solution for patients with high astigmatism and progressive myopia.

Backed by international patents and FDA recognition, Orthocyl not only delivers clear, stable vision but also provides long-term eye health benefits. By combining cutting-edge lens technology with proven myopia control strategies, Orthocyl empowers patients and parents with greater confidence in managing vision problems safely and effectively, without relying solely on glasses or surgical intervention.