Opinion Evidence (Expert Witnesses) is a type of evidence presented in a court of law that consists of testimony from a witness with specialized knowledge or expertise in a particular subject. This type of evidence is used to assist the trier of fact (judge or jury) in understanding complex matters. Expert witnesses provide evidence in the form of opinions, rather than facts, about a particular matter. Types of Opinion Evidence (Expert Witnesses) include medical experts, forensic experts, financial advisors, valuation experts, engineering experts, and any other type of expert who can provide valuable insight about a particular subject. Expert witnesses are typically used in cases involving complex or technical evidence, such as medical malpractice or patent infringement.