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Dioptric change in defocus at 40° temporal retina per average change in on-axis spherical aberration (7 mm pupil) for each contact lens.
| Lens Type | Mean Δ SA (microns) | 40T Dioptric Δ/Avg Δ SA |
|---|---|---|
| Biofinity | −0.34 | 1.07 D |
| PureVision2 | −0.33 | 1.04 D |
| Acuvue2 | −0.21 | 0.66 D |
| Air Optix Night & Day Aqua | −0.11 | 0.35 D |
