If your eyesight suddenly becomes blurry, double, or you lose vision in one eye without explanation, it could be more than just eye strain. This can happen when a stroke interferes with the parts of the brain responsible for processing vision. Even if the eyes are healthy, the brain may struggle to interpret what they are seeing. These vision problems may appear suddenly or develop gradually over a few hours, and they should never be ignored. Quick medical attention can make a major difference in preventing long-term stroke damage.