Glaucoma secondary to an intraocular tumor is correct!
Transillumination of the globe reveals a possible intraocular mass. You perform an enucleation. Although this eye has a mass, every enucleated eye should be submitted for histopathologic examination. Histopathologic examination in this case confirms that the mass is a melanoma. Although intraocular melanomas grow slowly and can invade the drainage angle and even grow through and out the sclera, their metastatic rate in dogs is low, so the prognosis is good. However, if the tumor causes problems such as secondary glaucoma, as it did in this dog, the eye needs to be removed.