<prompt> Most common etiolopathogenetic cause of glaucoma is: March 2012Raised pressure in episcleritic veinsDecreased outflowIncreased formation of aqueous humourIncreased scleral outflow  <response>: Ans: B i.e. Decreased outflow A sustained increase in intraocular pressure may be due to increased formation of the aqueous humour, difficulty in its exit, or a raised pressure in the episcleral veins of these, the first last rarely occur, and it follows that raised intraocular pressure is essentially due to an increased resistance to the circulation of the aqueous at the pupil and or its drainage through the angle of the anterior chamber. 