Dear Doctor: Should I be worried about sudden onset of blind spots, zigzag vision?

Sudden changes in your vision, such as blind spots or zigzag patterns, may hint at more than just eyestrain. This piece explores why bright lights and visual fluctuations could signal an oncoming migraine.

Dear Doctor: How do doctors, scientists use the body’s immune system to treat cancer?

Doctors and researchers have long recognized that our immune system has the potential to fight cancer. Recent breakthroughs have finally allowed that principle to evolve into powerful, immune-based therapies that bring renewed hope.