Blocking damaging light and wearing blue light filter glasses are both effective means of preventing your exposure to potentially harmful light emitted by digital screens (i.e. computers, smartphones, tablets, televisions, etc). There are many products to help reduce the risk of overexposure, including filters in the lenses of bluwinx glasses. However, be wary of filtering apps and software that shift the screen color on devices towards warmer tones. While these methods reduce the amount of emitted harmful light they fail to address the LED backlight emitting blue light as part of its white light.

Blue Light from Computer Screen

Studies show the most logical safeguards against damaging light are filters that reach into the 445 to 460 nanometer (nm) range, since that is the range in which the most harmful high energy blue light is emitted from digital devices. bluwinx glasses are designed to do just that as they filter 59% percent of 445-460 nanometers of peak digital device harmful light wavelengths.

Why Is Blue Light Bad For You?

Blue light is everywhere and is produced naturally by the sun, but we’re now exposed to artificial blue light in close proximity and at an alarmingly high rate. Blue light is the light, within the visible spectrum, that is transmitted in the 380-500 nanometer range. Rays on the blue end of the light spectrum have short wavelengths but high amounts of energy. It is transmitted at a high rate by electronic devices like cell phones and tablets.

Blue Light Protection Glasses

Science is beginning to explore the detrimental effects of too much exposure to blue light. While small amounts of blue light during the daytime are healthy, too much can be detrimental to our eyesight. The high amounts of energy produced by blue light cause our eyes to struggle to focus.

This happens because of the short wavelengths and high amounts of energy. It scatters more easily than other visible light causing our eyes to experience difficulty focusing, which then leads to digital eye strain. In the short term, this can lead to headaches and fatigue, as well as insomnia. Long term, this light can lead to more permanent health concerns, such as macular degeneration and vision loss.

Blue light leads to disruptions in the body’s natural circadian rhythm, which means trouble falling asleep or staying asleep. It also disrupts the body’s production of melatonin, the key hormone important to our sleep cycle. Lack of a good night’s sleep can lead to a number of chronic illnesses because it reduces the effectiveness of the body’s immune system. Immediate effects of insomnia are irritability, mood swings, fatigue, and trouble reasoning or making decisions. Long-term, sleep disruptions can cause health concerns such as diabetes, ADHD, heart disease, and cancer.

Studies show limiting exposure in the hours leading up to bedtime can reduce insomnia, significantly reducing the chances of developing other issues related to lack of sleep.

How Much Blue Light is Too Much?

Healthy Blue Light Morning Sun

Some blue light is healthy, and it’s even necessary for our bodies. The sun produces light that our body needs to help us wake up each day, be alert, and give us energy. This light we receive from the sun helps cognitive function and elevates our overall mood.

In fact, blue light is actually used in some therapy, notably to treat Seasonal Affective Disorder (SAD), a type of depression affecting people in winter when they’re exposed to lower levels sunlight.

Blue light is also important to a healthy sleep cycle. It’s needed to regulate a person’s natural wakefulness. Exposure during the day helps people maintain a natural circadian rhythm.

Blocking all light from our lives would be harmful. So how much do we need? And at what point in the day do we need to stop so we can prevent ourselves from overexposure.

Studies have shown great benefits to being in complete darkness as early as 6 p.m. However, that’s not conducive to modern lifestyles and most people have no desire to be in complete darkness so early in the evening. Instead, we can get similar benefits by filtering large amounts of artificial light throughout the day and limiting all damaging light in the three hours leading up to bedtime.

Even the slightest amount of damaging light can disrupt the body’s production of melatonin in the hours leading up to bed.

Blue Light Filter Glasses for Computer Use at Night

bluwinx filter the actual wavelengths coming off the device without significantly altering the color of the screen you’re viewing. Many products now exist to help block harmful light, but they are a yellow or orange tint which makes viewing devices difficult. Other products only filter small amounts. But bluwinx filters more than half of the peak digital device emitted light and doesn’t drastically distort color.

Blue Light Blocking

Blue light blocking glasses are eyeglasses with a noticeable yellow or amber tint on the lenses that block out all damaging light. But because these lenses block out 100 percent of the harmful light, they also dramatically change the color of what you’re looking at casting everything in a yellow tint.

The yellow tint of the light blocking glasses often causes screens to be difficult to read.

How Effective Are Blue Light Blocking Glasses?

Blocking glasses are effective at blocking harmful light. But some is necessary for our health. Light during daytime hours keeps us alert and aware. It’s not necessary or good for us to block 100 percent of the light we’re exposed to on a daily basis.

Since blue light blocking glasses cast a noticeable yellow tint, there are drawbacks for people who work in industries heavy in graphic or video editing. A yellow tint can skew how a person tones images or processes video, leaving the results unnatural. Additionally, the glasses will reflect a blue glare in photos of the person.

These blocking glasses are cheap, but have lower quality lenses and don’t come in the latest fashion for eyewear. They’re also not typically available with prescription lenses.

Blue Light Filtering

Filter glasses, however, are of better quality. They only filter out a portion of the harmful light, which will allow your body to maintain its natural circadian rhythm. Color is not drastically distorted by filtering glasses. bluwinx are available with prescription lenses and come in a variety of current styles.


bluwinx filtering glasses can be worn day or night while working or driving. These glasses do not reflect a blue glare in photos and present fewer drawbacks for people who work in industries heavy in graphics or video editing.

How Effective Are Glasses that Filter Blue Light?

bluwinx glasses filter 59% of the 445-460 nanometer range of blue light. Blocking 100% of damaging light throughout the day can actually harm your sleep patterns instead of helping them. Blocking all leads to problems waking, problems with reason and decision making, and problems with alertness.

Access to blue light upwards of 475 nanometers is essential for retinal health. Without exposure in that range, we are risking damaging our melatonin production. The most harmful range of exposure seems to be from 400-450 nanometers.

bluwinx allow some reasonable levels to penetrate the eye, unlike other products that block 100%. bluwinx glasses allow for healthy levels to enter the eye, while still protecting the eye from harmful levels. It’s a perfect balance for our health.


Kimberly, B., & James R, P. (2009). Amber lenses to block blue light and improve sleep: a randomized trial. Chronobiology international, 26(8), 1602-1612.

Sliney, D. H. (1983). Eye protective techniques for bright light. Ophthalmology, 90(8), 937-944.