In daily work, many patients and parents often ask: “Which lens is better? Will certain lens coatings harm the eyes? Do you have blue light blocking lenses?” Today, let’s take a brief look at common coatings for resin lenses.
Early lenses had no coatings. After long-term use, people found that uncoated lenses were prone to scratches and produced glare, which blurred vision. As a result, hard coatings and anti-reflective coatings were developed.
Main Functions of Different Coatings
Hard CoatingResin lenses are lightweight, safe and comfortable, yet they scratch easily with regular use. A wear-resistant hard coating is applied to the surface to enhance the lens hardness.
Anti-Reflective CoatingThis coating leverages the wave properties and interference of light. It effectively cuts down glare, delivering clearer vision.
Top Coating (Anti-Fouling Coating)Lenses with anti-reflective coatings tend to get dirty easily, which lowers light transmittance. An additional top coating is added to repel oil and dirt.
Blue Light Blocking LensThere are two main types of blue light blocking lenses on the market: coating reflection type and substrate absorption type.
Reflection type: The lens is coated with a film that reflects short-wave blue light, giving the lens surface a blue-violet tint.
Absorption type: Special color infiltration technology tints the lens yellow to absorb blue light. Such lenses appear yellowish-brown with a dark coating.
How to Choose the Right Lens Coating
Lens coatings are manufactured through sophisticated processes to provide multi-layer protection. They affect the lens service life, appearance and visual clarity. Generally speaking, coated lenses outperform uncoated ones, and functional coatings work better than regular ones.
Choose coatings according to your personal needs, as the most suitable option is always the best:
People who frequently use electronic devices are recommended to choose blue light blocking coatings.
Primary and secondary school students may opt for peripheral defocus lenses.
Adults should prioritize protection against ultraviolet rays and blue light; photochromic and blue light blocking lenses are great choices.
Hard coatings are ideal for those who value durability and scratch resistance.
Anti-fouling coatings suit people who require lenses to stay clean easily.
Green coating is the most common and standard anti-reflective coating. It offers UV protection and excellent light transmittance, presenting clear, natural and true colors. It is comfortable to wear and perfect for people with high color perception requirements and students.
Do not select lenses merely based on their appearance. Always pick what works best for you.
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