How to choose the type of glasses for glasses? What to consider when choosing?
Types of spectacle lenses due to construction
What types of lenses do we choose, due to the material from which they are made
Types of coatings on spectacle lenses
The more important factor is the type of vision defect you have. For example, for nearsightedness (near-sightedness), the glasses will be different than those needed for farsightedness (distance).
- Lifestyle – Your daily activities and lifestyle can also influence your choice of glasses. For example, if you drive a car, you can opt for anti-reflective lenses that provide better visibility at night;
- Physical activity – if you are physically active, e.g. playing sports, there are special lenses and glasses that provide greater durability and protection against injuries;
- Budget – The cost of the glasses depends on many factors, including the type of glasses and additional features that may be required. Typically, better glasses will cost more, but it’s worth consulting your eye doctor or optician for help choosing the best solution for your budget;
- Aesthetics – the choice of glasses also depends on your aesthetic taste. Various types of glass are available, including round, rectangular, square and many others that vary in shape, thickness and colors.
It is best to consult an ophthalmologist or optician to help you choose the right type of lenses for your glasses, taking into account your individual needs and preferences.
Due to the construction of spectacle lenses, several types can be distinguished:-
- Monofocal – these are glasses that have one corrective power for the entire surface of the lens. They are used to correct single vision defects such as myopia, hyperopia or astigmatism;
- Progressive – these are glasses that allow the correction of many vision defects in one glass, and also have a gradual transition between corrective powers, which allows for smooth and natural adjustment of vision to different distances;
- Bifocal – these are glasses that have two different corrective powers in one glass, enabling the correction of two vision defects, usually myopia and hyperopia. They are most often used by the elderly;
- Trifocal – these are glasses that have three different corrective powers, enabling the correction of three vision defects, usually myopia, hyperopia and astigmatism;
- Phototropic – these are glasses that change their color depending on the intensity of light. In low light, they are bright, and in strong light, they are darker, which allows for better vision and protection of the eyes from excessive sunlight;
- Polarizing – these are glasses that use a special light filtration technology to reduce glare and glare. They are used by people working in places with high light intensity or while driving a car;
- Aspheric – these are glasses that have a spherical surface of an irregular shape, which allows you to improve the quality of vision at the edges of the lens. We use them in progressive glasses;
- High-index – these glasses have a high refractive index, which means that they are thinner and lighter than standard single-focal lenses. They are used by people with a large vision defect, because they reduce the effect of “lens” thickness.
- Trivex – are glasses with high impact and scratch resistance, which makes them ideal for use outdoors or in difficult conditions, such as extreme sports or physical work.
Sunglasses – Sunglasses are designed to block harmful UV rays that can cause eye damage such as cataracts and macular degeneration
Eyeglass lenses are made of various materials, and each of them has its advantages and disadvantages. Here are some of the most common eyeglass lens materials:
- Mineral glass – a traditional material used for the production of spectacle lenses. It has a very good optical quality, but is heavy and breakable, which makes them less comfortable to wear;
- Organic glass – also known as organic glass or polycarbonate, is a material that is lighter and more durable than mineral glass. It also has a lower optical quality than mineral glass;
- Plastic – a material that is very light, resistant to damage and has good optical quality. Manufacturers most often use this material for the production of eyeglass lenses;
- Polarized – these are lenses that manufacturers made of plastic or glass. They designed them in such a way as to reduce light reflections and improve contrast.
- Photocromic – these lenses contain special dyes. They change color depending on the intensity of the light, which allows them to act as two pairs of glasses in one.;
- Trivex – is a material that is similar to polycarbonate, but has better optical quality and is more durable.
The choice of lens material depends on the individual preferences and needs of the wearer and from the indications of an ophthalmologist.
Spectacle lenses can have different types of coatings, each with its own unique properties and functions. Here are some of the most common types of coatings on eyeglass lenses:
- Anti-reflective coating (AR) – reduces light reflections on the surface of the lens, which improves the quality of vision, reduces glare and eye fatigue;
- Hardening coating (HC) – increases the resistance of the lens to scratches and mechanical damage;
- Hydrophobic coating – this coating is responsible for the water resistance of the lenses and makes them easier to clean;
- Photocromatic coating – lenses with such a coating change their color depending on the intensity of light. They darken in bright light and lighten in darker light;
- Polarizing coating – prevents light glare, especially when driving a car or water sports;
- Blue light filtering coating – prevents the emission of blue light that can be harmful to the eyes. Such a risk occurs during prolonged use of electronic devices.
- Antibacterial coating – prevents the growth of bacteria on the surface of the lenses, which helps maintain eye hygiene.
Remember that each lens coating has its advantages and disadvantages. Their choice depends on your individual needs and lifestyle