What is the difference between blue light glasses and computer glasses?

The difference between blue light glasses and computer glasses is very subtle but once you understand these differences it will become very obvious and ensure you wear the correct glasses.


Computer glasses have a clear lens and are used to combat digital eyestrain when working at a computer during the daytime. Blue light glasses have an orange or red lens and are used to help with sleep, migraines and stress at night.

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What are computer glasses?

Computer glasses are a type of spectacle that is designed to be worn during the day when working at a computer screen. Computer glasses have a clear lens and come in prescription, non-prescription and reading magnification options in most cases. You do not have to have any issues with your eyesight to wear computer glasses as they can be used as a preventative measure against the dangers of blue light.

Computer glasses help relieve symptoms of digital eyestrain. Digital eyestrain has symptoms such as dry eyes, watery eyes, headaches, stiff neck or fatigue. The symptoms of digital eyestrain typically occur after using a computer for long periods of time. What causes digital eyestrain is high energy visible light (HEV). This HEV light is often called blue light as is emitted in large quantities from your computer or laptop screens. This blue light can cause stress to the cells in our eyes, causing us to strain to see. The blue light also flickers which causes our brains to work harder which can result in headaches or migraines.

By wearing computer glasses during the day, when working on a computer, we can reduce the amount of blue light that passes through our eyes which leads to a reduction in the symptoms of digital eyestrain, fatigue and headaches.

The best computer glasses are ones that filter down a small amount of blue light. We do not want to block blue light during the day as we need some blue light to function properly. This is why a god quality pair of computer glasses are great at protecting your eyes from digital eyestrain throughout the day.

The worst computer glasses are ones which filter down violet or green light, these are not good for during the daytime as the damaging light found in computer screens is blue light. You can tell if your computer glasses are not working as when you look at them they will reflect violet or green light back at you. If they reflect blue light, like these glasses:

Computer glasses

then they are the best computer glasses for your needs.


What are blue light glasses?

Blue light glasses are often wrongly classified as computer glasses. Blue light glasses are actually designed to help you sleep and are best worn two to three hours before bedtime. Blue light glasses have to block 100% of blue and green light between 400nm and 550nm to work in line with the clinical evidence to improve sleep. This means they 100% have to be dark amber, orange or red in colour. Clear lenses, aka computer glasses, will not block blue light, its actually impossible. Blue light glasses block blue and green light which disrupts melatonin production and impacts us falling sleep, staying asleep and our sleep quality. Harvard health has shown that blue light impacts sleep which can lead to diabetes, heart disease or obesity. By wearing a pair of good quality blue light glasses 2-3 hours before bed you can get a better sleep. By wearing computer glasses with a clear lens 2-3 hours before bed you will have no positive affect on your sleep.

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The Differences between blue light glasses and computer glasses

The table below shows the main differences between blue light glasses and computer glasses


Blue Light Glasses

Computer Glasses

Lens Colour



Time Worn

2-3 hours before bed

When using a computer during the day


To help improve sleep

To help with digital eyestrain

Target Light

100% of blue and green light between 400nm and 550nm

5-30% of blue light between 400nm and 495nm

Prescription Types

Non-prescription, prescription and reading magnification

Non-prescription, prescription and reading magnification


To see the best blue light glasses and the best computer glasses backed by science visit BLUblox.com

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