After glaucoma surgery, if it is a trabeculectomy and no abnormal follicles are present it will usually persist. Glaucoma is a collective term for a group of diseases that ultimately impair vision, progressive optic nerve damage, and are associated with pathologically elevated intraocular pressure. When the pressure exceeds the limits of what the tissues within the eye can tolerate, a variety of conditions can result. Glaucoma surgery, however, is a filtration procedure that addresses the difficulty in draining atrial fluid through extraocular drainage, allowing communication between the anterior and posterior chambers. A filter bubble is an artificial filter for the aqueous humor to circulate through, through which the intraocular pressure is maintained in equilibrium. If the follicle disappears and the aqueous humor circulation is impaired, the IOP will rise, causing a recurrence of glaucoma. In the case of trabeculectomy, the follicle will remain in place, but it is important to have regular checkups. If there is any abnormality in the follicle that affects the intraocular pressure, it needs to be repaired and treated in a timely manner.