An unpleasant blinding spot from headlights or a reflection of the dashboard in glasses is a direct consequence of the lack of quality glare-coating The optics that the driver notices first when driving at night. When the light stream passes through the lens, some of it is scattered inside the material, creating lights that interfere with view and make you squint. The technology of enlightenment, or reflexIt minimizes these light losses and eliminates parasitic glare by making the image clear and contrasting.
The essence of the technology lies in applying to the surface of the lens several microscopic layers of metal oxides, which extinguish the reflected light due to wave interference. Unlike conventional glass, which reflects up to 10-15% of incident light, modern glass is a very light-emitting glass. lens reduce this figure to 0.5-1%. This not only improves the visual perception of the road, but also reduces the strain on the eye muscles, preventing rapid fatigue during long trips.
It is important to understand that glare-glasses This is not a separate type of medical optics, but a characteristic of the surface treatment of any lens, whether it is for vision correction or sun protection. The efficiency of such glasses depends on the number of layers applied: budget options have single-layer spraying, while professional optics for drivers can contain up to 7-9 layers, each of which is responsible for a certain function, including water repellent and hardening.
The principle of operation of antireflex coating
The physical process of eliminating glare is based on the phenomenon of interference of light waves. When light hits the surface of the lens, part of it is reflected from the outer surface and part from the inner surface. If the thickness of the applied layer is selected exactly for the length of the light wave, the reflected rays extinguish each other without getting into the eye of the observer or into the camera lens. This phenomenon allows the maximum amount of useful light to pass to the retina of the eye.
Quality. layering It operates over a wide range of wavelengths, providing neutral color balance. Cheap analogues often have a pronounced greenish or purple residual glare, which indicates the operation of the coating only in a narrow range of the spectrum. For drivers, this is critical, as distortion of the color reproduction of traffic lights or road markings can lead to an erroneous assessment of the situation on the road.
Modern technologies allow spraying by vacuum spraying, which ensures high adhesion of layers to the lens material. The process involves several stages: cleaning, applying a hardening layer, applying enlightening layers and the final hydrophobic coating. Disruption of technology at any stage leads to rapid destruction. antireflex And microcracks.
Why are glares dangerous for the driver?
Glare creates a “light curtain” effect, reducing the contrast of the image. At night, this reduces the distance of visibility of obstacles, and sharp flashes from headlights cause temporary disorientation comparable to short-term blindness.
The main types of coatings and their characteristics
There are many variations in lens processing on the optical products market, and it is easy for the buyer to get confused in terms. The basic option is Hard Coat - a hardening coating that protects the plastic from scratches, but does not have pronounced anti-reflective properties. The next level is single-layer enlightenment, which only slightly improves light transmission.
The most effective solution is considered Multicoat (multi-coating), which combines several functional layers. It not only removes glare, but also repels water, fat and dust. For automotive themes, this is especially important, since raindrops or splashes from under the wheels on such glasses collect in large drops and roll quickly without blurring the view.
- 🔹 Single Layer Basic enlightenment that removes the main white glare but leaves colored halos.
- 🔹 Multi Layer - comprehensive protection, providing high transparency and durability of optics.
- 🔹 Blue Blocker - a special layer that cuts off the harmful blue spectrum from LED headlights and screens of gadgets.
- 🔹 Hydrophobic - water-repellent finish layer, facilitating the care of glasses.
The main criterion for choosing is the residual color of the glare. A green or golden hue indicates a high-quality multi-layer spraying, whereas a purple or bright blue hue often indicates a simplified technology.
Differences between anti-glare glasses and polarization glasses
Consumers often confuse anti-reflective coating with polarization, but these are fundamentally different physical processes. Antireflex. It works with light passing through the lens and reflected off its surface, improving transparency. Polarization filters They also cut off light waves reflected from horizontal surfaces (asphalt, snow, water), which have a certain direction of vibrations.
For driving in clear sunny weather, polarization is indispensable, as it removes the blinding glare from the wet asphalt or hood in front of the car. However, in cloudy weather or at night, polarizing glasses can be useless and even harmful, as they darken the image and can hide the liquid crystal displays of navigators or dashboards of modern cars.
Anti-glare glasses, in turn, are universal and suitable for use at any time of the day. They do not darken the picture, but make it cleaner. The ideal option for an avid motorist is a combination: transparent lenses with a glare-coated night and polarizing glasses for bright sun.
The effect of anti-reflective optics on eye fatigue
Long driving without enlightenment leads to computer vision syndrome even without using monitors. The eyes are constantly straining, trying to “break through” the light curtain from glare, which causes a spasm of accommodation. Use of lenses with antireflex Reduces the need for such tension, allowing the muscles of the eye to relax.
⚠️ Warning: If you feel a pain in your eyes, headache or dryness after the trip, check the condition of your glasses. Scratches and scuffs on the anti-reflective layer can increase the scattering of light, exacerbating the problem.
In addition, high-quality optics improves the contrast of the image, which allows you to notice pedestrians in dark clothes or defects in the roadway earlier. It is not only a matter of comfort, but also an element of active safety. Reducing visual noise allows the brain to process information from the visual organs more quickly.
Studies show that drivers wearing glasses with quality enlightenment are less likely to make mistakes when rearranging and evaluating distance at dusk. This is because the pupil does not shrink reflexively from bright flashes, maintaining optimal light flux for peripheral vision.
Rules of care and operation of lenses
Anti-reflective coating, despite its strength, is sensitive to aggressive chemistry and mechanical influences. The main mistake of users is wiping dry lens with clothes or paper napkins. On the surface remain microparticles of dust, which when friction work as an abrasive, leaving irreversible scratches on the surface. lens.
To clean the optics, special sprays and microfibers must be used. Water with soap is also acceptable, but you should avoid washing dishes containing aggressive surfactants or alcohol, which can destroy the hydrophobic layer. After washing, the lenses should be wet, not rubbed.
Keeping glasses is recommended in a hard case. Left on the torpedo of the car in direct sunlight, they can overheat. Plastic base and coating have a different coefficient of thermal expansion, which when heated above 60-80 degrees Celsius leads to cracking. antireflex (web effect)
☑️ Daily eye care
Comparative Characteristics Table
To finally understand the difference between the different types of optics processing, it is worth looking at comparative data. The table below shows the key parameters that affect the choice of accessory for the driver.
| Parameter | Normal glasses. | Anti-Glare (Anti-Reflective) | Polarizational |
|---|---|---|---|
| Light transmission | ~85-90% | ~98-99% | Depends on the dimming (10-80%) |
| Protection against glare of headlights | No. | Tall. | Medium (depending on angle) |
| Color distortion | Minimum | Absent. | Maybe (depends on the filter) |
| Use of night use | Not recommended | Recommended | Not recommended |
| Resistance to scratches | Medium | Tall (with Hard Coat) | Medium/High |
When buying glasses in the cabin, be sure to ask to demonstrate the work of the anti-glare. Illuminate the lens with a phone flashlight: a high-quality coating will give a soft greenish or golden glow, rather than a bright white spot.
Frequent Questions and Answers (FAQ)
Can the anti-reflection coating be restored?
Unfortunately, the factory re-establishment vacuum-spray It's not possible at home. Attempts to apply any liquids or sprays will give only a temporary and low-quality effect. If the coating is damaged, the lens must be replaced.
Does the anti-glare affect the performance of radars and cameras in the car?
No, optical illumination only works in visible light and does not interfere with infrared sensors of night vision systems, cruise control radars or DVR cameras.
Is it true that anti-glare glasses can be seen in the eyes of the interlocutor?
This is one of the main advantages of technology. Because the lens does not reflect light, it becomes virtually invisible and your eyes are clearly visible to others, which improves visual contact and communication.
How long does a high-quality anti-glare coating last?
With proper care and use of high-quality microfiber multicoating The entire life of the lenses is 3-5 years. If you violate the rules of cleaning (wiping with dry cloth), it can become unusable in 6-12 months.