Presentation:
Members of the panel are always gratified to see that a performer has made an effort to turn up to an audition looking as good as they can. First impressions are vital and it's important to make a positive impact. It reflects and enhances your profile as a performer and shows that you care about what you do. It also helps members of the panel retain a clearer recollection of you and a your audition for their later discussions.
Glasses and Hair:
It's equally vital to be able to see the performer's face, so it's important that your hair (no matter how fashionably styled) doesn't hide it.
Footwear:
When it comes to footwear it is best not to wear very high heels for the audition.