It is known that light exposure suppresses melatonin secretion. Melatonin is a hormone which can influence circadian rhythms. Lower melatonin levels may explain the preliminary evidence of links to cancer.

Blue Light is the specific section of the visible light spectrum that can have harmful effects to our eyes and sleep.

Artificial blue light is emitted from LED lighting and from digital devices. Our close proximity to the device when viewing, especially over long periods of time, means that the harmful blue light can affect us and our children’s wellbeing.

The rays of the sun may appear to be colorless, but they're actually made up of red, blue, orange, yellow, green and violet hues. Red and orange are located at one end of the visible light spectrum, while blue and violet are at the other.

Red rays have long wavelengths, but produce less energy. At the other end of the spectrum, the wavelengths are shorter, but the energy is stronger. Because blue rays emit higher amounts of energy, they're more likely to affect your eyes.

Most of your exposure to blue light comes from the sun, but you can't avoid exposure simply by staying indoors. In addition to computer monitors and smartphones, blue light is produced by tablets, LED and fluorescent lights, LED light from TVs and compact fluorescent light bulbs.

Although blue light plays an important role in maintaining the sleep/wake cycle, regulating your mood and keeping your memory sharp, it may harm your eyes.

Long exposure to blue light may have been responsible for your symptoms. Blue light lowers the contrast on screens, causing the condition. Other factors that can contribute to eyestrain include poor lighting, failing to take regular breaks, less frequent blinking and dry air.

Long-term exposure to blue light may increase your risk of developing age-related macular degeneration (AMD). AMD occurs when the macula, the area of the retina responsible for central vision, is damaged.

Fluorescent light bulbs and LED lights do provide more energy efficiency than traditional incandescent bulbs. They also give off more blue light. Incandescent lights do produce some blue light, although less than most of the fluorescent light bulbs available.

During the two to three hours right before bed, avoid viewing bright screens.

Wear blue-blocking glasses or download an app to filter blue and green wavelength at night. This will help those that need to use electronic devices at night and individuals working night shifts.

Red light has the least influence on the circadian rhythm. Consider using dim red lights in bedrooms.

Add screen filters to computer screens, tablets and smart phones to reduce blue light emissions.

Use computer glasses that have yellow-tinted lenses that increase contrast and help block blue light.

Wear anti-reflective lenses to block blue light from digital devices and the sun.

Consider choosing an Intraocular lens (IOL) that protects eyes from blue light. This will replace a cloudy lens during cataract surgery.

For children, especially from birth to age three, the crystal lenses in their eyes are not fully developed. So it goes straight through, it causes a lot more damage in children’s eyes than it does in adults.

Blue light does affect the body’s circadian rhythm, our natural wake and sleep cycle. During the day, blue light wakes us up and stimulates us. But too much blue light exposure late at night from your phone, tablet or computer can make it harder to get to sleep.

Blue light from computer screens and digital devices can decrease contrast leading to digital eyestrain. Fatigue, dry eyes, bad lighting, or how you sit in front of the computer can cause eyestrain. Symptoms of eyestrain include sore or irritated eyes and difficulty focusing.

Studies suggest that continued exposure to blue light over time could lead to damaged retinal cells. This can cause vision problems like age-related macular degeneration.

After cataract surgery, the cloudy lens will be replaced with an intraocular lens (IOL). The lens naturally protects the eye from almost all ultraviolet light and some blue light. There are types of IOL that can protect the eye and retina from blue light.

Screen filters are available for smart phones, tablets, and computer screens. They decrease the amount of blue light given off from these devices that could reach the retina in our eyes.

I'm one of nine sisters. My parents were dairy farmers in Wisconsin. My father didn't believe in girls doing farm work. Girls did housework, and he hired young men to do farm work. I would have preferred to be outside.

Whoever is careless with the truth in small matters cannot be trusted with important matters.

If my boss knew how unproductive I am on Fridays, he wouldn’t want me here either.

Morning without you is a dwindled dawn.

God Almighty has set before me two great objects: the suppression of the slave trade and the reformation of manners.

I have never concealed my dual citizenship. People involved in state business should probably declare their dual citizenship if they have it.

Another important historical factor is the fact that this already very simple religion was further simplified and purified by the early philosophers of ancient China. Our first great philosopher was a founder of naturalism; and our second great philosopher was an agnostic.

If something is boring after two minutes, try it for four. If still boring, then eight. Then sixteen. Then thirty-two. Eventually one discovers that it is not boring at all.

If you look back at President Bush, nobody agreed with his policies, but you understood that he was doing things that he believed was right.

My wife accuses me - and she's probably right - that I'm sometimes oversensitive.

I have to face life with a newly found passion. I must rediscover the irresistible will to learn, to live and to love.

I don't like cream puff, corny guys. Usually, they are the nice guys, the ones that won't hurt you. They'll pull out the chair for you and the whole nine yards. Everything is perfect and boring.

Its not at all naturally human to see something like the Grand Canyon as beautiful.

I keep two sentimental mementos on my desk to remind me of two favorite men. There is an inkwell that my Uncle Seymour made, a brass grotesque he mounted on a marble base. And my grandfather's shaving cup is there, used to store pencils and pens.

You don't make a statement unless you make noise.

That if desperate times call for desperate measures then Im free to act as desperately as I wish.

I spoke at TED Global 2010 about the ways that video games engage the brain, and in particular, the idea of reward structures: how a challenge or task can be broken down and presented to make it as engaging as possible.

I understand the importance of political power, so I will use my strength and influence to convince as many people as I can within the party and outside the party that a Palestinian state is bad news for Israel.

It's wonderful to be appreciated for being quirky, and to see Zooey Deschanel and the quirky, indie film types get mainstream play is amazing for women, because women are much more complicated than what we've see on TV in the past.

The beauties of the game may be lost on some of us sometimes, but many children will read about football when they will read nothing else, not for realism or glamour but for romance.

Hugh Everett's work has been described by many people in terms of many worlds, the idea being that every one of the various alternative histories, branching histories, is assigned some sort of reality.

We ought not to be looking for something spectacular but rather develop a plan in conjunction with the White House to work our way out of this problem over the next six weeks.

What I really can't stand about the feminist revolution is that it produced some of the smuggest, most unselfcritical people the world has ever seen. They are horrible.

My house is solar powered. I tell Republicans, you can hate the subsidies - I hate the subsidies, too - but you can't hate solar panels. These are rocks that make electricity, so they are incapable of receiving your hate.