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.

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-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.

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.

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.

My entire life changed when I became a mother - my priorities, my understanding, appreciation of life, and my relationship with God.

Gold and silver, like other commodities, have an intrinsic value, which is not arbitrary, but is dependent on their scarcity, the quantity of labour bestowed in procuring them, and the value of the capital employed in the mines which produce them.

You are a little god on earth running around.

'Kraken' is set in London and has a lot of London riffs, but I think it's more like slightly dreamlike, slightly abstract London. It's London as a kind of fantasy kingdom.

A thoughtful mind when it sees a Nations flag sees not the flag only but the Nation itself.

Fur is not luxury: it is an industry of death and suffering.

As the caterpillar undergoes transformation and emerges as a butterfly; likewise, character undergoes transformation through experiences, aspirations and beliefs. How will you emerge?

I'm not just saying this because I'm in the movie, but I really would recommend 'Secretariat.' It's fun, inspiring, and it's a great movie to take your little kids, brothers, sisters, or nieces and nephews to see that actually has real people in it and not animated characters.

I have been complimented many times and they always embarrass me; I always feel that they have not said enough.

When I hear somebody sigh, Life is hard,' I am always tempted to ask, Compared to what '

They're dressing like in the 50's when they come out to the shows, and many of them have vintage cars.

You see, there weren't these magazines like 'Heat' in my day. Always waiting to trip up these pretty girls and make them seem something horrible, something to make them look stupid and small and ugly and disgusting.

A good cup of Earl Grey tea - you can't beat it.

I would like to draw your attention to the fact that in Russia, unlike in one third of the world's countries, being gay is not a crime.

One of the secrets of a happy life is continuous small treats.

Every time we bring someone in we ensure that they are a strategic thinker, but even more important that they understand that if the products aren't successful and the products don't sell that there won't be anything to strategize about.

Let your children be as so many flowers, borrowed from God. If the flowers die or wither, thank God for a summer loan of them.

I am the luckiest filmmaker I know.

Learn to let urgency go. Nothing is urgent. Stress is the product of uncertainty and urgency of life.

I have friends who are very pessimistic. They say you can't possibly be an optimist nowadays. But I think, taking the longer view, you can still be as optimistic as you want.

I grew up loving X-Men, Spider-Man and Batman.

When you're in politics sometimes you step on toes and they come back and kick you in the backside.

I'm not interested in being liked.

Any writer who says he loves writing is crazy. Or lying.