he main difference between reading glasses and computer glasses lies in the focal distance the lenses are designed for.
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Reading glasses (close distance): These glasses are optimized for a distance of about 35–40 cm from the eyes to the text. This is the distance at which we typically hold a book, newspaper, or smartphone.
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Computer glasses (intermediate distance): A computer monitor is usually located 60–80 cm from the eyes. This is the so-called "intermediate zone."
What happens if you use reading glasses in front of a monitor? Because the reading diopter is too strong for the distance to the monitor, your eyes are forced to constantly strain to compensate for this mismatch. The result is "Computer Vision Syndrome," which includes:
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Severe headaches in the forehead and temples.
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Dryness and burning in the eyes (due to less frequent blinking during strain).
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Blurred vision when trying to look into the distance immediately after work.
Blue Light: The Invisible Enemy of Your Sleep and Comfort
Even if you are lucky enough to see well on your monitor with your reading glasses, they almost never have protection against blue light. Artificial light from LED monitors, tablets, and smartphones is rich in high-energy blue waves.
Quality computer glasses must include a Blue Cut (Blue Block) coating. It acts as a filter that reflects or absorbs harmful blue light before it reaches the retina. This not only reduces fatigue but also helps with better sleep at night, as blue light suppresses the production of melatonin—the sleep hormone.
Types of Solutions: From Ready-made Glasses to Custom Lenses
At blink.bg, we often get asked if "ready-made reading glasses" from gas stations are a good option. The short answer is—they are a compromise that we do not recommend.
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Ready-made reading glasses: They have the same diopter for both eyes (which is rare in nature) and do not account for your pupillary distance.
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Computer glasses with diopter: These are made individually according to your prescription. They include protective coatings (anti-reflective and Blue Cut) and are centered exactly for your eyes.
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Progressive lenses: This is the "gold standard." They have a smooth transition—the top part is for distance, the middle for the computer, and the bottom for reading. This way, you have one pair of glasses for everything.
Tips for Comfortable Screen Work
In addition to the right glasses, follow the 20-20-20 rule: every 20 minutes, look at an object 20 feet (about 6 meters) away for at least 20 seconds. This allows the eye muscles to relax.
If you work intensively in front of a computer, investing in computer glasses without a diopter (if you don't need correction) or with an individual diopter is an investment in the long-term health of your eyes.
FAQ
Can I put a Blue Cut coating on my reading glasses? Yes, of course! If you need a diopter for reading, we can craft lenses with that diopter that also have a blue light filter. This will provide you with protection for both reading a book and working with a tablet.
Why do computer glasses have a slight yellowish tint? The Blue Cut filter neutralizes the sharp blue spectrum of light, which gives a very slight warm (amber) hue to the lenses. Modern technologies, however, make it almost invisible without changing the colors on your monitor.
How often should I change my computer glasses? If your diopter doesn't change, the lenses can last for 2–3 years. It is important, however, to check the condition of the coatings—if the anti-reflective layer cracks or gets scratched, the blue light protection decreases significantly.
Which frame is most suitable for computer work? Choose a frame with larger lenses to have a wider field of vision. Materials like lightweight acetate or titanium are preferable so you don't feel weight on your nose after 8 hours of work.
