Dojutsu ("Eye Techniques") are genetic ninja abilities that utilize the eyes, enabling them to perceive chakra in some form or another. Being a by-product of specific kekkei genkai, dojutsu are not classified as one of the major jutsu types. They do not require the use of hand signs and facilitate in the user or denfence against genjutsu, taijutsu, and ninjutsu and then defeat his or her opponent. All known dojutsu also provide the user with some otherwise incapable ability, such as an extended field of vision or predictive capablilities. The use of Dojutsu consumes chakra.