Most common etiolopathogenetic cause of glaucoma is: March 2012
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.
Raised pressure in episcleritic veins
Decreased outflow
Increased formation of aqueous humour
Increased scleral outflow