Unexpected flashes of light in your eye can be alarming, and in many cases, it’s something that should be discussed with your doctor as soon as possible. That said, these bright flashes are not always ...

Q: Over the years, I occasionally experience a streak of light across my vision, which goes away quickly. However, I have recently noticed a persistent small black spot when looking out of my right ...

Blinking is a reflex, which means your body does it automatically. You can also make yourself blink when you want to. Excessive blinking is when you blink more than you want to. A number of things can ...

Rapid heart rate, fast breathing, and a sudden, overwhelming feeling of panic — anxiety can cause these physical and mental changes. Some people report other changes when their anxiety is high, namely ...

The latest iteration of an eye-on-a-chip has a mechanical eyelid to simulate blinking and was used to test an experimental drug for dry eye disease. By incorporating human cells into an engineered ...

People have long reported seeing flashes of light during brain radiotherapy. Until now, no one has been able to capture evidence of this sensation in humans, and only theory, models, and speculation ...