Stabilization
Precision Curve dual thin zone design, letting both eyelids apply equal pressure to keep the lens in the correct position.
Geometry
Toric back surface design, with scribe marks at 3 and 9 o'clock and an inversion indicator reading OK (near the lower edge of the lens).
Material
Cross-linked polyvinyl alcohol forms the bulk of the lens, with additional non-crosslinked polyvinyl alcohol floating freely in the lens matrix.
Wetting agent
Hydroxypropyl methylcellulose, polyethylene glycol (PEG) and polyvinyl alcohol (PVA), the free polyvinyl alcohol being released from the lens at each blink.
Note
The on-eye stability data come from investigator assessment of lens rotation at one week, n=181 lenses, using investigator lenses with -0.75 and -1.50 cylinder powers.
