Transient glaucoma following basal iridectomy occurred In 21 of 59 eyes. The filtration angles were open and the facilities of outflow were reduced during the transient elevations in ocular pressure. The mean duration of the elevation was nine days (median six days). The mean peak pressure was 32 mm Hg for the 21 eyes. This postoperative pressure elevation is of clinical importance because the effect of a basal iridectomy may not be known for weeks.
Gills JP. Transient Glaucoma After Basal Iridectomy. Arch Ophthalmol. 1967;78(1):44-46. doi:10.1001/archopht.1967.00980030046008