Light affects sleep in a number of different ways - so perhaps it's no surprise that an increasing number of companies are looking to cash in.
The latest product that caught my eye is called the Re-Timer. Basically, they're green light glasses that supposedly help to adjust your body clock.
The manufacturers of these new glasses suggest using them for 50 minutes in the morning if your goal is to sleep and wake earlier, or 50 minutes before bed if you want to slow the body clock down.
For close to $300 for a pair, I'd recommend natural light as a free alternative - get at least 30 minutes of natural light exposure (more if it's cloudy) in the morning and you'll improve your sleep quality and sleep health.
Source: Flinders University
Last updated: January 16, 2013