This loss of vision in the peripheral visual field can be due to optic nerve damage caused by glaucoma, high internal eye pressure, retinal detachment, occlusion of blood supply as in eye stroke, optic neuritis, and optic nerve edema. Tunnel vision is also possible after a history of head injury, concussion, brain damage and stroke. Benign intracranial hypertension is another possibility. So, yes, it is important to urgently consult a neurologist since you have also started developing neurological signs. Take care!
The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you. The advice may not be completely correct for you as the doctor cannot examine you and does not know your complete medical history. Hence this reply to your post should only be considered as a guiding line and you must consult your doctor at the earliest for your medical problem.