Spatial light modulation in PLZT ceramics involves variation of the ferroelectric properties in conjunction with the related electrooptic, light scattering, surface deformation, and photosensitive properties of the material. Several combinations of these properties have been used to design a variety of spatial light modulators. Most PLZT light modulators are also capable of non-volatile storage of digital or analog information which can be read out with transmitted or reflected visible light. This paper surveys several types of modulators and compares some of their important characteristics.