Direct evidence refers to the witness testimony based on his or her perception by his or her senses such as hearing or sight of the facts in issue.
However, direct evidence, may also include presentation of things or documents to the tribunal of fact.
The tribunal of fact may be asked to act on its own perception of the quality and nature of the things or document.
Direct evidence especially the one related to the testimony of the witness in relation to the facts in issue may lead to issue regarding the credibility and reliability of the witness.
The issue of relevance is not importance in this case.