The Disadvantages Of Blue Light Glasses (From A Brand That Sells Them) 

Almost everything written about blue light glasses is promotional. This is the drawback list, written by a brand that sells a pair, because a customer who buys for the wrong reason returns it. 

1. Colour distortion is unavoidable 

The fundamental trade-off in the category. 

Blocking blue wavelengths effectively means removing part of the visible spectrum, which shifts how everything looks. Amber gives the world a warm cast; red more so. 

For anyone doing colour-critical work — design, photo editing, video, textiles, even checking product photos — tinted lenses are unusable during that work. And clear lenses that avoid distortion block correspondingly little. 

You cannot have both. Any product claiming maximum blocking with no visual difference is misrepresenting physics. 

 

2. Most people wear them at the wrong time 

The evidence supports evening use for sleep. Most people wear them all day for eye strain, where the evidence does not support them. 

The result is a product used where it does least, then judged to have failed. This is arguably the biggest problem in the category, and marketing created it rather than the product. 

 

3. Daytime blocking may be counterproductive 

Genuinely under-discussed. 

Your circadian rhythm depends on bright light during the day, particularly morning light, to stay anchored. Daytime blue light is a signal you want. 

Wearing blue-blocking lenses all day may weaken that signal. For someone already struggling with sleep, blocking daytime blue light while sitting indoors is potentially working against the outcome they want. 

 

4. False reassurance 

Wearing them can create a sense that screen exposure has been handled, reducing motivation to do the things that actually matter — taking breaks, fixing posture, blinking, getting an eye test, and reducing screen use before bed. 

A product that substitutes for effective action is a net negative even when harmless in itself. 

5. Specifications are almost never stated 

Very few products in India specify what percentage of which wavelengths they filter. Without that you cannot compare products or verify claims. 

Some clear lenses marketed as blue blocking filter only a few percent, concentrated in violet wavelengths that matter least. The label may be technically accurate and practically meaningless. 

 

6. Cost relative to free alternatives 

Blue light glasses in India run from a few hundred rupees to several thousand. 

Free or cheaper alternatives with comparable or better evidence: enabling night mode on devices, dimming ambient lighting in the evening, moving the screen further away, and simply not using screens in the final hour before bed. 

None is as convenient as putting on glasses. But cost-effectiveness deserves an honest mention. 

7. They do not change the behaviour 

If you are on a screen until midnight, amber lenses may reduce melatonin suppression somewhat. They do not address the cognitive stimulation, the content keeping you awake, or the displaced sleep time. 

The glasses filter one input. They do not change the habit. 

Where they still make sense 

Having laid all that out: for evening use, with genuine amber or red tint, worn in the two to three hours before bed by someone whose sleep is affected by evening screen exposure — sound mechanism, reasonable evidence, worth buying. 

That is a narrower recommendation than most marketing makes. It is the one the evidence actually supports. 

This article is for general information and is not medical advice.