  Dislocations have a profound influence on materials functional properties. In
this perspective, we discuss the recent development of quantized dislocations -
a theoretical tool that aims to compute the role of dislocations on materials'
functionalities, at a full quantum field theoretical level. After a brief
discussion of the motivation and a pedagogical introduction of quantization, we
focus on a few case studies of dislon theory, to see how dislon can be applied
to solve a given materials functionality problem and lead to new predictions.
We conclude by visioning a few more open questions. With the aid of the
powerful quantum field theory, the dislon approach may enable plenty
opportunities to compute multiple functional and quantum properties in a
dislocated crystal at a new level of clarity.
