1.What is nystagmus? Nystagmus is the occurrence of involuntary, rhythmic back and forth movements of both eyes. Nystagmus arises as a result of factors related to visual, vagal and central control of eye position. It is most often detected in the first few months of life and presents with involuntary rhythmic oscillations of the eyes, poor visual acuity, and often . It is often accompanied by strabismus. Some patients with congenital nystagmus have a compensatory head position due to the presence of a lighter nystagmus in a certain direction of vision, i.e., intermediate band or resting eye position, and therefore show a “tilted head vision”. 2.Can nystagmus be treated? From a therapeutic point of view, we can broadly classify nystagmus into two categories: those with intermediate band and those without intermediate band. The so-called intermediate band refers to a direction in which nystagmus is very light or even no nystagmus, and therefore the best vision, and is seen in congenital idiopathic nystagmus. Patients often adopt a compensatory head position, tilting their head to look at things in order to position this intermediate band in front of them, thus improving their vision. Patients with nystagmus without an intermediate band usually have poor vision because the nystagmus prevents the eye from fixating. Nystagmus can be treated with an intermediate band transposition and an extraocular muscle proprioceptive resection. After surgery, not only the appearance can be significantly improved, but also the visual acuity can be significantly improved.