The invention discloses an optical lens comprising a lens body and at least one optical layer. The lens body has a central zone and a peripheral zone encircling the central zone. The at least one optical layer is arranged on the lens body. The at least one optical layer is arranged in the peripheral zone and the central zone is exposed. At least one first bar-shaped gap zone connected with the central zone is formed in the peripheral zone; and the at least one first bar-shaped gap zone is exposed by the at least one optical layer. In addition, the invention also discloses a tool that is used for fixing the lens body of the optical lens during the optical lens manufacturing process. According to the optical lens, the optical performances of the peripheral zone are improved on the condition that the ideal assembly precision is kept.