Objective:To study the broad scope of the"five-wheeltheory"and perfect the theoretical system of the"fivewheel theory.Methods:By searching the literature,the five-wheel doctrine was extended in a broad sense,combining the traditional five-wheel doctrine and the related dialectical thinking mode of the inner five-wheel hypothesis.Conclusion:All the muscle fibers inside and outside the eye,including ciliary muscle and extraocular muscle,are controlled by the spleen.The soft tissues of the fascia represented by the suspensory ligament of lens,cornea,sclera,uvea and retina(except the components of blood vessels)are all dominated by the liver.The blood vessels inside and outside the eyes represented by the middle retinal artery are all controlled by the heart;the water and visual pathway represented by tear and aqueous humor(including refractive system and nerve conduction system)are controlled by the kidney,in which the secretion of glands is controlled by the spleen.The coordinated function of refractive system and visual pathway is controlled by the lung.