Ophthalmic apparatus with corrective meridians having extended tolerance band

A rotationally-tolerant intraocular toric lens for correcting astigmatism, the toric lens comprising:

• a multi-zonal lens body comprising one or more angularly-varying phase members that each includes an optimized combination of angularly and zonally refractive phase structure located across one or more optical zones to apply cylinder power at one or more correcting meridian, wherein each of the one or more angularly-varying phase members applies the cylinder power at a given correcting meridian and vary an extended depth of focus to a plurality of nearby points of focus to provide an extended tolerance to misalignment of the intraocular lens when implanted in an eye,
• wherein the multi-zonal lens body forms an angularly-varying phase member having a peak cylinder power centered at an astigmatism correcting meridian θ the angularly-varying phase member at the peak cylinder power being configured to direct light, at the correcting meridian, to a first point of focus on the retina, wherein at angular positions nearby to the correcting meridian, the angularly-varying phase member varies, at each optical zone, and is configured to direct light to points of focus nearby to the first point of focus such that the multi-zonal lens body, when rotational offset from the peak cylinder power, directs light from the nearby points of focus to the first point of focus, thereby establishing an extended band of operational meridians over the correcting meridian,
• wherein each phase structure has a height profile T1(r, θ) at a face of the multi-zonal lens body that angularly varies along the extended band of operational meridians over the corrective meridian, and wherein the height profile T1(r, θ) for the correcting meridian θ is defined as:
• T1(r,θ)=t1(r)|COS2(θ)|+t2(r)|SIN2(θ)|
• where t1(r) and t2(r) are the added power for each zone.