The Magic Lens are an item purchased at most stores for a low price. However, these items are highly valuable. When these are used, you're able to see the enemy's current health and TP when targeting them. This also places their information into the monster guide book, and is needed to fill it. When Raine from Tales of Symphonia uses this item, it will copy what the enemy drops in the Monster List as well. Magic Lens is also known as Spectacles in the English versions of Tales of Destiny and Tales of Eternia.