**4.4 Retinoschisis**

Retinoschisis, or abnormal splitting or retina's neurosensory layers, is not common in ROP. However, the incidence of it is not known for the most part due to the relative difficulty on indirect ophthalmoscopy or digital eye imaging systems. Some features commonly encountered in premature infants, such as corneal haze, presence of tunica vasculosa lentis or vitreous hemorrhage make particularly difficult [37].
