I have a blurred vision spot in both eyes that comes on during times when im feeling very warm (after a hot shower) or dehydrated. lasts about 5-10min?

See ophthalmologist : Optic neuritis is an inflammation of the optic nerve, a bundle of nerve fibers that carry images from your retina to your brain. Each fiber carries part of the visual information to the brain. In optic neuritis, some or all of the nerve fibers become inflamed and do not function properly, and vision becomes blurred.Blurred vision in one or both eyes esp after exercising or taking a hot bath