Optical film and display system incorporating same

An optical stack comprising:

• a reflective polarizer;
• a first light redirecting film comprising a first major surface and an opposing second major surface, the first major surface facing the reflective polarizer and comprising a first plurality of microstructures extending along a first direction, the second major surface comprising a second plurality of microstructures;
• and
• a second light redirecting film comprising a third major surface and an opposing fourth major surface, the third major surface facing the second major surface of the first light redirecting film and comprising a third plurality of microstructures extending along a second direction different than the first direction, the fourth major surface comprising a fourth plurality of microstructures, wherein:
• at least one of the second and fourth major surfaces has an optical haze that is not greater than about 3% and an optical clarity that is not greater than about 85%.