Does polycythemia vera secondary effect glaucoma?

Indirectly. Because polycythemia Vera results in too many red blood cells being formed, blood flow may stagnate leading to vascular obstructions. If this occurs in the eye, as in a central retinal vein occlusion, the resulting consequence can lead to secondary glaucoma, which is often very difficult to manage. .
It shouldn't. Glaucoma is an increase in the intraocular pressure with other effects on the eye. In polycythemia there are too many blood cells and blood clots and/or bleeding can result in the eyes especially in the retina. In this way the polycythemia can affect the intraocular pressure but without clotting/bleeding should not affect the glaucoma primarily. You need to be followed by an ophthalmologist.