The iris root was displaced into the bleb through the break and incarcerated, thus blocking the aqueous humor outflow and causing the IOP to rise rapidly, which is one of the complications of NPTS. 1 UBM can clearly image the anterior segment of the eye, so it is widely used to evaluate the bleb and to explore the potential reasons for failure of the bleb after NPTS. 2,3 However, in this case, from the UBM picture, we could not identify the iris root location and its relationship with ciliary. In addition, there was a strong reflective cycle in the bleb, which could easily be misinterpreted as a bleb encapsulation. However, an encapsulated bleb would not be associated with an acute increase in IOP, as encapsulation is a slow process. In combination with the supplementary clinical examination results, we concluded that the strong reflective cycle was actually the incarcerated iris. To the best of our knowledge, this exceptional phenomena has not been reported before.NPTS, which does not enter the anterior chamber during the operation, and in the absence of an iridectomy, would ensure little postoperation inflammation. However, a small percentage of patients were observed with an increasing IOP at prolonged periods after NPTS, which may be due to rupture of the trabeculo-decemet's membrane or adherence of iris root to the membrane. 1 These complications, followed up with NPTS, were induced by a consistent existing pressure difference between the upper and lower iris surface after the surgery. Therefore, it is worth considering to perform a laser iridectomy at the surgical area, before the NPTS, as a means of preventing these surgical complications.