This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Ophthalmology
Argon laser trabeculoplasty is done in: 
Select and explain. 
A. Angle closure glaucoma, B. Angle recession glaucoma, C. Secondary glaucoma, D. Open angle glaucoma
D: Open angle glaucoma
Answer: D: Open angle glaucoma 
Explanation: In Argon Laser Trabeculoplasty (ALT) Laser beam is focused on trabecular meshwork Opens up the pores of trabecular meshwork. So that more Aqueous can flow through it in faster time Lowers Intra ocular pressure Typically done in open angle glaucoma Trabecular meshwork After ALT