Which of the following is a consequence of glaucoma?

In glaucoma, one of the primary consequences is increased intraocular pressure (IOP). This condition occurs when the fluid (aqueous humor) in the eye does not drain properly, leading to a buildup of pressure within the eye. Over time, this increased pressure can damage the optic nerve, potentially resulting in vision loss. It is important to monitor and manage eye pressure in individuals at risk for or diagnosed with glaucoma to prevent serious complications.

The other options do not relate to the primary effects of glaucoma. The absence of blood in the anterior chamber is a normal finding; while blood might indicate an injury or condition like hyphema, it is not a direct consequence of glaucoma. Pain in the ear and muscle cramps are unrelated symptoms that can stem from different medical issues but are not associated with glaucoma. Hence, increased eye pressure is the hallmark consequence that underscores the pathology of this eye disease.