Complex sentence: In open/wide-angle glaucoma, flow is reduced through the trabecular meshwork, due to the degeneration and obstruction of the trabecular meshwork, whose original function is to absorb the aqueous humor.
Split into simpler sentences: In open/wide-angle glaucoma, there is reduced flow through the trabecular meshwork. This reduced flow is due to the degeneration and obstruction of the trabecular meshwork, whose original function is to absorb the aqueous humor.