POLY(VINYL ACETAL) RESIN COMPOSITIONS, LAYERS, AND INTERLAYERS HAVING ENHANCED OPTICAL PROPERTIES

A tapered interlayer comprising at least one resin layer and a having tapered zone with a wedge angle of at least 0.13 mrad. The first resin layer comprises a first poly(vinyl acetal) resin and at least one RI balancing agent. The refractive index of the first resin layer is at least 1.480.