Uhthoff's Syndrome - A metabolic by-product of exercise, or an increase in body temperature causes a Reversible Conduction Block in a DeMyelinated Optic Nerve, resulting in the temporary loss or blurriness of Vision.
Uhthoff's Symptom (temporary Visual Loss with exercise), is an indication of previous Optic Neuritis damage and is a major risk factor for the recurrence of Optic Neuritis and the further development of Multiple Sclerosis.
Urinary Retention - Involuntary accumulation of excessive Urine in the Bladder. #25
Uveitis - Inflammation within the middle layer of the Eye (the Uvea) between the Sclera and Retina, affecting any of the three parts of the Uvea:
- Uveites includes Retinal Venous Sheating, which represents active Periphlebitis (Sclerosis) that occurs in 10 - 20% of MSers, and symptoms range from mild to severe. Its complications are directly proportional to the extent and severity of the Ocular inflammation. They include: Glaucoma, Cataracts, Macular Edema, Retinal Detachment, and Vitreous Hemorrhages. #31
- The Iris - the colored part of the Eye
- The Ciliary Body - behind the Iris, which makes the fluid inside the Eye
- The Choroid - a Vascular lining beneath the Retina