sentences:  The benefits of glaucoma surgery with iridotomy versus no iridotomy are currently unclear.Preliminary data from two trials with a sample of 2502 eyes of 1251 participants showed evidence that iridotomy may increase angle width by 18 months (12.70 degrees), but may also be associated with IOP spikes at one hour after treatment.An iridectomy, also known as a corectomy or surgical iridectomy, involves the removal of a portion of iris tissue.