Euclid Emerald (orthokeratology)
Euclid Vision
Manufacturer / labEuclid Vision
Product / familyEuclid Emerald
DesignReverse-geometry overnight corneal reshaping lens (VST-style five-zone geometry) optimised for myopia management
Corrects / indicated forMyopia reduction and paediatric myopia progression control
Materialoprifocon A (Equalens II)
Dk100 ×10⁻¹¹ (material)
Overall diameter10.2-10.8 mm
Optic zone~6.0 mm
Centre thickness~0.22 mm
Power rangeup to ~-6.00 D myopia, ~-1.50 D astigmatism (label)
Wear scheduleovernight
ReplacementAnnually
Fitting approachEmpirical design from flat/steep K, HVID and manifest refraction submitted to Euclid; refine from morning topography difference maps. Toric peripheral options for lens decentration on astigmatic corneas.
Widely used ortho-K platform for myopia management in North America; strong lab design support. Manufactured and distributed in the US by ABB Optical Group since 2023. Euclid MAX is the newer design.
Verify parameters against current manufacturer documentation before fitting.