Orthokeratology
Corrective contact lenses
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Key Takeaways
- History Doctors discovered the reshaping phenomena of glass lenses as early as the 1940s.
- George Jessen created what was probably the first orthokeratology design in the 1960s made from PMMA material, which he marketed as "Orthofocus".
- Many groups and individuals claim to have been the first to develop modern orthokeratology solutions.
- Hanisch and Nick Stoyan, in particular, are generally credited with developing the first reverse zone lens design in the 1980s.
Orthokeratology, also referred to as Night lenses, Ortho-K, OK, Overnight Vision Correction, Corneal Refractive Therapy (CRT), Accelerated Orthokeretology, Cornea Corrective Contacts, Eccentricity Zero Molding, and Gentle Vision Shaping System (GVSS), is the use of gas-permeable contact lenses that temporarily reshape the cornea to reduce refractive errors such as myopia, hyperopia, and astigmatism.
History
Doctors discovered the reshaping phenomena of glass lenses as early as the 1940s. This history of orthokeratology includes contributions made by multiple authors to the use of contact lenses for myopia reduction.
George Jessen created what was probably the first orthokeratology design in the 1960s made from PMMA material, which he marketed as "Orthofocus". These early designs had generally unpredictable results, leading to the belief that applied orthokeratology was more art or luck than science. Many groups and individuals claim to have been the first to develop modern orthokeratology solutions. However, Dr. Richard Wlodyga, Dr. Philip B. Hanisch and Nick Stoyan, in particular, are generally credited with developing the first reverse zone lens design in the 1980s.
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