It is not mandatory to sit and lie down after laser treatment of retinal embolism, unless there is a combination of combined vitreous hemorrhage at the same time. Retinal embolism usually refers to retinal vein embolism, which requires laser treatment to close off the non-perfused area of the retina to avoid complications such as neovascular glaucoma caused by blood vessel formation. When retinal vein embolism, patients will have symptoms such as blurring and distortion of seeing, and if there is a perfusion-free zone on the retina found through imaging, the perfusion-free zone needs to be closed as soon as possible through laser treatment to avoid complications such as neovascular glaucoma, etc. It is not necessary to keep sitting and lying down after laser treatment for simple retinal vein embolism. However, if the patient also has vitreous hemorrhage, the patient should remain in sitting position, which is good for the vitreous hemorrhage to sink and be absorbed, but has no relationship with the recovery from laser treatment. If there is any discomfort, it is recommended to consult a doctor.