Zenlens & Zen RC scleral
Bausch + Lomb (Alden Optical)
Manufacturer / labBausch + Lomb (Alden Optical)
Product / familyZenlens / Zen RC
DesignFull scleral with Smart Curve limbal system; Zenlens for prolate (ectasia) corneas, Zen RC (reverse curve) for oblate / post-refractive-surgery corneas
Corrects / indicated forKeratoconus and ectasia (Zenlens), post-RK / hyperopic-shift / oblate corneas (Zen RC), ocular surface disease
MaterialOptimum Extreme (Dk 125) / Infinite (Dk 180)
Dk125 ×10⁻¹¹ (material)
Overall diameter16.0 & 17.0 mm
Optic zonecustomizable
Sagittal depth4100-5500+ µm
Centre thickness~0.35 mm
Power range+30.00 to -30.00
Cylinderperipheral toric / bitoric
Add powercentre-near multifocal
Wear scheduledaily wear
ReplacementAnnually
Fitting approachProlate vs oblate decision drives the starting lens. Independent limbal clearance adjustment via Smart Curves; aim for 100-150 µm limbal clearance, no haptic blanch.
Having a dedicated reverse-geometry scleral (Zen RC) makes this a strong choice for post-RK and decentred myopic LASIK corneas.
Verify parameters against current manufacturer documentation before fitting.