Beyond this 'event horizon' the intense light gives way to something even more exciting - absolute blackness.

A relentless and sometimes painfully intense light show proved another distraction.

Asthenopia corrects itself if we have a break from intense light and allow the eye muscles to relax.

In stage one, bursts of intense light are directed at areas of uneven skin tone and sun damage to reduce pigmentation and visible blood vessels.

The application of the photoacoustic effect had to wait until the development of sensitive sensors and intense light sources.