Prescription Glasses Lenses Explained | Lens Types, Materials & Coatings

​​Why Choosing the Right Prescription Lenses Matters

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Prescription lenses do more than correct your eyesight. The right lens design, material and coatings can improve visual comfort, reduce unwanted reflections, help manage lens thickness and make your glasses more suitable for everyday activities.

The best choice depends on several factors, including:

• Your prescription strength and lens requirements.

• Whether you need distance, reading or multiple-distance vision.

• Your frame size, shape and style.

• How much time you spend driving, working at a computer or outdoors.

• Your preferred lens weight, appearance and budget.

There is no single best lens for everyone. At Ilkeston Factory Specs, we'll explain the available options and help you choose prescription lenses that suit your individual needs.

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Types of Prescription Glasses Lenses

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​​​​​Different lens designs are available for different visual requirements. Understanding the main options makes it easier to choose glasses that work for your daily routine.

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Single Vision Lenses

​Single vision lenses have one prescription across the lens and correct a particular viewing distance. Depending on your prescription, they can be used for distance vision, reading or computer work.

They are a popular choice for everyday glasses because they offer straightforward vision correction and can be supplied in a variety of materials and coatings.

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Reading Lenses

​Reading lenses are designed for close-up activities such as reading books, using a smartphone, sewing and other detailed work. They can help people who need additional assistance focusing at near distances.

Your prescription and visual requirements will determine whether dedicated reading glasses or another lens design is more suitable.

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Distance Lenses

​Distance lenses correct vision for activities such as driving, watching television, shopping and recognising people at a distance.

They can be customised with suitable lens materials, anti-reflection coatings and other options depending on your prescription and intended use.

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Varifocal Lenses

​Varifocal lenses, also known as progressive lenses, combine distance, intermediate and near prescriptions in one lens without the visible dividing line found in traditional bifocals.

They are designed for people who need help seeing clearly at different distances and prefer not to switch between separate pairs of glasses.

The design, fitting measurements and frame choice are important for achieving comfortable vision. Our dispensing team can explain the available options and help you choose suitable varifocal lenses.

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Bifocal Lenses

​Bifocal lenses contain two prescription areas within one lens. The upper section is generally used for distance vision, while the lower segment provides near vision for reading and close work.

A visible line separates the two areas. Bifocals remain a practical option for people who need both distance and reading correction in one pair of glasses.

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Office and Occupational Lenses

​Office and occupational lenses are designed for indoor environments where clear vision is needed at close and intermediate distances.

They can be useful for computer work, reading paperwork, meetings and other desk-based activities. Depending on the design, they can provide a wider usable viewing area for screens and nearby tasks than conventional reading glasses.

These lenses are particularly worth considering if you spend long periods working at a desk or regularly move between your computer, documents and colleagues.

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Computer Glasses

​Computer glasses are designed to suit the viewing distance and visual demands of computer work. Depending on your prescription, they may use single vision or occupational lens designs.

The correct prescription and working distance are important. Anti-reflection coatings can also reduce distracting reflections from light sources and screens.

Blue-light filtering coatings are available as an option, although current evidence does not establish that they prevent digital eye strain.

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Photochromic Lenses

​Photochromic lenses automatically darken in response to suitable light conditions and become clearer again when those conditions change. They provide the convenience of glasses that adapt to changing environments.

The speed and degree of darkening depend on the lens technology, temperature and light conditions. Some photochromic lenses darken less inside vehicles because windscreens block much of the ultraviolet light that activates conventional photochromic technology.

​They are worth considering if you frequently move between indoor and outdoor environments and want a convenient alternative to carrying separate glasses.

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Polarised Prescription Sunglasses

​Polarised prescription lenses reduce reflected glare from surfaces such as wet roads, water and other bright reflective environments.

They can improve visual comfort outdoors and are particularly useful for driving in bright conditions, fishing, sailing and other activities where reflected glare is distracting.

We offer prescription polarised lens options in grey and brown, subject to availability and suitability. Polarised sunglasses are designed primarily for glare reduction and are not a substitute for appropriate eye protection in every situation.

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High-Index Thin Prescription Lenses

​High-index lenses are designed to bend light more efficiently than standard plastic lenses, allowing thinner lens designs for many prescriptions.

We offer a range of thin lens options, including:

• 1.6 high-index lenses for reduced thickness compared with standard plastic.

• 1.67 high-index lenses for prescriptions that may benefit from further thinning.

• 1.74 high-index lenses for suitable stronger prescriptions where minimising thickness is a priority.

The improvement in thickness depends on your prescription, frame dimensions, lens design and fitting measurements. Our team can compare the options and explain which material is likely to offer the best balance of appearance, comfort and value.

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​​​​​​​​​​​​​​​​​​​​​​​​​​​​Prescription Lens Materials Explained

​The material used to make your lenses affects their thickness, weight, impact resistance and optical properties. Choosing the right material is particularly important for stronger prescriptions, rimless frames and glasses worn during active pursuits.

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Standard Plastic Lenses

​Standard plastic lenses are a practical, cost-effective choice for many everyday prescriptions. They provide clear vision and are available for a wide range of single vision and varifocal requirements.

They are suitable for many frame styles and can be combined with appropriate coatings to improve everyday usability.

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Polycarbonate Lenses

​Polycarbonate lenses are lightweight and highly impact-resistant compared with conventional plastic lens materials. They are often considered for children's glasses, sports eyewear and other applications where impact resistance is important.

They also provide built-in ultraviolet protection. Suitability for particular safety or sporting applications depends on the complete eyewear specification, not the lens material alone.

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Trivex Lenses

​Trivex is a lightweight lens material known for its impact resistance and useful optical properties. It can be an excellent option for rimless frames and other applications where low weight and durability are important.

The most appropriate choice between Trivex and polycarbonate depends on your prescription, frame design, availability and visual requirements.

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1.6 High-Index Lenses

​1.6 high-index lenses provide a thinner alternative to standard plastic for many prescriptions. They can help reduce visible lens thickness while maintaining a comfortable, attractive appearance.

They are worth considering if your prescription is moderately strong or you would prefer a slimmer lens profile.

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1.67 High-Index Lenses

​1.67 high-index lenses offer further potential thickness reduction compared with 1.6 lenses. They may be suitable for stronger prescriptions or frames where lens appearance is particularly important.

Your dispensing team can compare the likely benefits against the additional cost of upgrading.

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1.74 High-Index Lenses

​1.74 high-index lenses are a very high-index plastic option intended for prescriptions where reducing lens thickness is a priority.

They can help minimise thickness in suitable prescriptions, although they are not automatically the best choice for everyone. Frame selection, lens design, optical performance and cost should all be considered.

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Which Lens Material Should You Choose?

​The right lens material depends on your individual requirements rather than prescription strength alone.

For example, a smaller frame may reduce lens thickness, while an impact-resistant material may be more suitable for active use. Our team will consider your prescription, frame choice and intended use before recommending an option.

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​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Prescription Lens Coatings and Upgrades

​Lens coatings can improve the everyday performance, appearance and ease of maintenance of your glasses. The most appropriate combination depends on how you use your eyewear.

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Anti-Reflection Coating

​Anti-reflection coatings reduce reflections from lens surfaces, helping improve the appearance of your glasses and reducing distracting reflections from light sources. They can be particularly useful for night driving, computer work, photography and situations where reflections are noticeable.

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Scratch-Resistant Coating

​Scratch-resistant coatings help protect lenses against everyday abrasion. They do not make lenses completely scratch-proof, so careful cleaning and storage are still important.

Using a suitable lens cloth and cleaning products can help maintain your glasses.

Hydrophobic Coating

Hydrophobic coatings help water bead and run off the lens surface, making lenses easier to clean and maintain in wet conditions.

They can be a useful feature for people who spend time outdoors or want an easier-clean lens finish.

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Oleophobic and Easy-Clean Coatings

​Oleophobic coatings help resist oily marks, fingerprints and smudges. They are often combined with other premium coating features to make lenses easier to clean.

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UV Protection

​Ultraviolet protection helps limit exposure of the eyes to harmful UV radiation. Many modern prescription lenses provide built-in UV protection, although the level varies by material and product.

When choosing sunglasses, consider the specified UV protection as well as tint and glare reduction.

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Blue-Light Filtering Coatings

​Blue-light filtering coatings are designed to filter a proportion of blue light from artificial sources. However, evidence does not establish that these coatings prevent eye strain or improve eye health for typical screen use.

If you experience discomfort when using a computer, the more useful starting points may include checking your prescription, reviewing screen distance, reducing reflections and taking regular breaks.

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Photochromic and Tinted Lenses

​Photochromic lenses change tint in response to light conditions, while permanently tinted lenses provide a consistent shade.

Tinted prescription lenses and sunglasses can be chosen according to your intended activities. For driving and outdoor use, consider the tint, UV protection and any additional glare-reducing features required.

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How to Choose the Right Prescription Lenses

​Choosing suitable lenses involves more than matching the numbers on your prescription. Your everyday activities, frame style and visual needs all influence the best option.

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1. Consider Your Prescription

​Your prescription helps determine the suitable lens design and material. Stronger prescriptions may benefit from high-index materials, but the best option also depends on the shape and size of the chosen frames.

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2. Think About Your Daily Activities

​Reading, driving, working at a computer and spending time outdoors create different visual demands. Single vision, varifocal, occupational and specialist lenses each serve different purposes.

Tell us how you use your glasses so we can recommend suitable options.

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3. Choose Frames That Complement Your Lenses

​Frame dimensions can have a significant effect on lens thickness, particularly for stronger prescriptions. Smaller, well-centred frames can sometimes produce a thinner result than larger frames with the same prescription.

Rimless and semi-rimless frames may also have specific material and fitting requirements.

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4. Select Useful Coatings

​Anti-reflection, scratch-resistant and easy-clean coatings are common considerations for everyday glasses. Other features may be helpful depending on your work, hobbies and outdoor activities.

We'll explain which upgrades offer practical benefits for your needs.

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5. Balance Performance and Budget

​Standard lenses provide excellent everyday vision for many prescriptions. Premium materials and coatings can offer additional benefits, but the most expensive option is not necessarily the best for every customer.

Our team will help you compare the available choices and decide where an upgrade is worthwhile.

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Why Choose Our Onsite Optical Laboratory in Ilkeston?

​At Ilkeston Factory Specs, our onsite optical laboratory allows us to carry out many lens glazing, fitting and finishing tasks in-house. This provides greater control over the work we complete and helps us offer a more personal service.

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Precision Lens Edging and Fitting

​Prescription lenses are carefully shaped and fitted to the selected frames. Accurate measurements and appropriate fitting are important for comfort, appearance and optical performance.

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Quality Control

​We check completed glasses for appropriate lens fitting, alignment and relevant optical measurements before they are returned to customers.

Experienced Optical Technicians

Our optical laboratory team works with prescription lenses and frames to produce finished glasses suited to the customer's requirements.

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Same-Day Lens Services

​Selected single vision prescriptions and suitable replacement lens jobs may be completed on the same day, with some services available in as little as one hour.

Availability depends on prescription requirements, lens stock, frame condition and the work involved. Please contact us or visit the shop to confirm whether your particular job can be completed within your required timeframe.

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Replacement Lenses and Reglazing

​If your existing frames are still in good condition, replacing the lenses may be an alternative to buying a completely new pair of glasses.

Our reglazing service allows suitable frames to be fitted with new prescription lenses, helping you keep your favourite eyewear while updating your vision correction.

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Prescription Lens Replacement and Glasses Services

​We offer several ways to help you get the glasses you need.

 

Replace Lenses in Your Existing Glasses

If your lenses are scratched, damaged or no longer suitable for your prescription, we can assess your frames for replacement lenses.

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Reglaze Your Glasses

​Reglazing allows suitable existing frames to be fitted with new prescription lenses. Depending on your requirements, you may be able to upgrade your lens material or coatings at the same time.

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Same-Day Glasses

​If you need glasses urgently, ask about our same-day service. Selected prescriptions and lens options may be available for rapid production and fitting.

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​New Prescription Glasses

​If you want a completely new pair, explore our selection of designer and everyday frames and choose lenses to suit your prescription and lifestyle.

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​Professional Lens Measurements

​Accurate measurements are important when ordering prescription glasses, particularly varifocal lenses and other designs requiring precise positioning.

Our team can take the relevant measurements and advise on suitable frames and lens options.

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Serving Ilkeston, Derby, Nottingham and the East Midlands

​Ilkeston Factory Specs is an independent eyewear specialist based in Ilkeston, Derbyshire. Our optical laboratory and lens services are available to local customers and, where supported by the service, customers ordering online.

We serve customers from Ilkeston, Derby, Nottingham, Long Eaton, Beeston, Heanor, Ripley, Mansfield, Leicester and surrounding areas.

Whether you are looking for thin prescription lenses, varifocals, replacement lenses or help choosing suitable coatings, our team can guide you through the available options.

Visit Ilkeston Factory Specs for professional advice on prescription lenses, replacement lenses and reglazing.

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Frequently Asked Questions About Prescription Glasses Lenses

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Which prescription lenses are best?

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The best lenses depend on your prescription, visual requirements, frame choice and budget. Single vision lenses suit one viewing distance, while varifocals combine distance, intermediate and near correction. Occupational lenses may be more suitable for some desk-based tasks.

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Can I replace my glasses lenses without buying new frames?

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Yes. If your existing frames are suitable and in good condition, reglazing may allow you to keep them and fit new prescription lenses. The frames must be assessed for compatibility and condition before work begins.

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How long does prescription lens replacement take?

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Turnaround times depend on the prescription, lens availability and work required. Selected jobs can be completed on the same day, with some suitable services available in as little as one hour. Contact us to check availability before travelling if you need glasses urgently.

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Are thin prescription lenses worth it?

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Thin high-index lenses can be beneficial for many stronger prescriptions because they may reduce lens thickness. The improvement depends on the prescription and frame dimensions, so the most suitable index should be selected individually.

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What are high-index lenses?

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High-index lenses use materials that bend light more efficiently than standard plastic. This allows thinner lens designs for many prescriptions. Common options include 1.6, 1.67 and 1.74 index materials.

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What is the difference between single vision and varifocal lenses?

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Single vision lenses provide one prescription across the lens for a particular viewing distance. Varifocal lenses combine distance, intermediate and near prescriptions in one lens without the visible dividing line found in bifocals.

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Are bifocal or varifocal lenses better?

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Neither is best for everyone. Bifocals have two distinct prescription areas separated by a visible line, while varifocals provide a gradual change between viewing distances. Your prescription, preferences and visual needs will help determine which is most suitable.

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Which lens coatings should I choose?

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Anti-reflection and scratch-resistant coatings are useful options for many everyday glasses. Hydrophobic and easy-clean coatings can make maintenance easier, while other features depend on your intended use. Our team can explain the available coating combinations.

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Do blue-light glasses reduce eye strain?

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Blue-light filtering lenses have not been shown convincingly to prevent digital eye strain. If screen use causes discomfort, checking your prescription, adjusting screen distance and managing reflections may be more helpful.

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Are photochromic lenses suitable for driving?

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Some photochromic lenses work well outdoors, but conventional UV-activated versions may not darken significantly behind a windscreen. If you need sunglasses for driving, ask about suitable prescription sunglasses and their specified features.

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What are polarised prescription lenses?

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Polarised lenses reduce reflected glare from surfaces such as roads and water. They are useful for many outdoor activities and can improve visual comfort in bright conditions.

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Which lenses are best for computer work?

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Suitable computer lenses depend on your prescription, screen distance and work environment. Single vision computer lenses or occupational lenses may be useful for some people, while anti-reflection coatings can reduce distracting reflections.

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Can I get new lenses in designer glasses?

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Often, yes. Many existing designer frames can be reglazed, provided they are in suitable condition and compatible with the required lenses. We can assess your frames and discuss the available options.

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Do you offer prescription lens services near Derby and Nottingham?

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Yes. Our optical laboratory is based in Ilkeston, Derbyshire, and serves customers from Derby, Nottingham and surrounding East Midlands areas. Online replacement lens services are also available where applicable.

Find the Right Prescription Lenses at Ilkeston Factory Specs

Whether you need single vision, bifocal or varifocal lenses, thinner high-index materials, specialist coatings or replacement lenses for your existing glasses, Ilkeston Factory Specs can help you explore the available options.

Our independent optical specialists combine professional dispensing advice with an onsite optical laboratory, offering personalised service for customers who want comfortable, practical prescription glasses.

Visit us to:

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• Compare prescription lens types and materials.

• Explore thin and lightweight lens options.

• Choose suitable lens coatings and upgrades.

• Replace scratched or outdated lenses.

• Ask about reglazing your existing frames.

• Check availability for same-day lens services.

• Receive professional measurements and fitting advice.

 

No appointment is necessary for an initial enquiry. Bring your current glasses or prescription into our Ilkeston store, and our team will help you understand the options available for your needs.

Ilkeston Factory Specs — expert advice, prescription lens replacement and professional lens fitting in Ilkeston, Derbyshire.