Optical Article Including Curved Optical Film

An optical article comprising a curved optical film wrapped about a central axis so that opposing first and second ends of the curved optical film join and form a seam therebetween, the seam extending between opposite top and bottom of the curved optical film spaced apart by a distance H, the curved optical film having an average thickness of less than about 500 microns and an average optical transmittance of greater than about 40% for a substantially normally incident light, for at least one polarization state, and for a first wavelength in a wavelength range extending from about 420 nm to about 1550 nm,

• such that, in a first cross-section of the curved optical film in a first plane that comprises the central axis, the curved optical film has opposing first and second curved cross-sectioned portions, wherein across a middle 60% of at least one of the first and second curved cross-sectioned portions, the cross-sectioned portion has:
• a minimum radius of curvature R1min of less than about 15 cm;
• and
• for the first wavelength, an average in-plane index of refraction Navg, and a maximum in-plane birefringence DN, DN/Navg being no more than about 0.04.