This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Surgical Procedures For Glaucoma, Subject name: Ophthalmology
[{'content': 'Iridectomy is a treatment option in: \nSelect and explain. \nA. Pigmentary glaucoma, B. Angle closure, C. Psuedoexfoliative glaucoma, D. Open glaucoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: B (Angle closure glaucoma) Ref: Basak Diseases of the eye 5th edition, pg no 455Explanation:IRIDECTOMY:Abciston of a portion of the iris usually done in the upper part where it is covered by the upper lid .Types of iridectomy:Peripheral Button Hole Iridectomy. Indications:Angle closure glaucoma.As a part of trabeculectomy operation.In Intracapsular cataract extractionIn penetrating keratoplastyTo prevent Pupillary Block GlaucomaComplete IridectomyOptical Iridectomy- Done in eases of Central corneal opacity, axial congenital cataractIRIDOTOMY: Section of the iris without abscising any portion of it.Indications:To create artificial pupilLaser iridotomv - PACG & post operative papillary block glaucoma4 point iridotomv - to prevent glaucoma in iris bombe.', 'role': 'assistant'}]