<qa>  What is the IOP?- A diagnosis of glaucoma with an intraocular pressure IOP greater than or equal to 25 millimeter of mercury mmHg while being treated with an ocular hypotensive drug. Treatment should be no more than 1 drug preparationcombination, which can contain 1 or 2 ocular hypotensive active ingredients; participants receiving more than 2 ocular hypotensive active ingredients are excluded 