Lens Guide: Types, Features, Thickness & Tips

The right lenses can completely transform your vision and your comfort. At Eydio, we believe a perfect fit goes beyond just the frame — your lenses should be tailored to your prescription, your lifestyle, and your daily needs. This guide will help you understand your options and choose the best lenses for you.

Prescription Types

Your eyeglasses prescription, provided by your eye doctor or optometrist, determines which type of lens is best for you. At Eydio, we offer lenses to match all common prescription types, so you get clear, comfortable vision tailored to your unique needs and lifestyle. Here’s a quick overview to help you understand your options.

Single Vision Lenses

These lenses correct one field of vision — either for distance or for reading. They’re the most common choice for everyday wear.

Progressive Lenses

Need clear vision at all distances? Progressive lenses offer seamless correction for far, intermediate, and near vision, all in one lens — no visible lines, just natural transitions.

Reading (Near Vision) Lenses

Made specifically for close-up tasks like reading or detailed work. Perfect for those who only need help with near vision.

Non-Prescription Lenses

No vision correction, just style or eye protection. Choose these for blue light filtering, fashion, or sun protection without a prescription.

Single Vision Lenses
Progressive Lenses
Reading (Near Vision) Lenses
Non-Prescription Lenses

Lens Types & Recommended Uses

Different lenses suit different needs. Here’s a quick guide to our lens options and who they’re best for:

Standard Clear Lenses
High-quality, transparent lenses—ideal for everyday activities, school, work, or simply going about your day.

Blue-Violet Light Filtering Lenses
Designed to reduce your eyes’ exposure to potentially harmful blue-violet light from screens, LED lights, and the sun. Perfect for people who spend long hours on digital devices or under artificial lighting.

Anti-Reflective Lenses
Minimize reflections and glare for sharper vision and less eye strain. Great for computer work, reading, and driving at night.

Fog-Free + Anti-Blue Light Lenses
Stay clear even in humid or mask-wearing situations, while also protecting your eyes from digital eye strain. Ideal for active lifestyles, healthcare professionals, and anyone on the go.

High-Performance Gaming Lenses
Specially engineered for gamers, these lenses help block intense blue and UV light and reduce screen glare, so you can play longer with more comfort and focus.

Photochromic & Blue-Violet Light Filtering Lenses
Enjoy full protection with lenses that filter blue light indoors and automatically darken outdoors in sunlight. Perfect for people who move between indoor and outdoor environments all day.

Prescription Types

Lens index determines how thin and light your lenses will be. Higher index lenses bend light more efficiently, so they require less material—meaning thinner, lighter lenses even for strong prescriptions.

1.74 Index

  • Ultra-thin and ultra-light
  • Best for very strong prescriptions above -6.00 or +6.00

1.67 Index

  • Significantly thinner and lighter
  • Great for higher prescriptions between SPH -3.50 and -6.00, or +3.50 and +6.00

1.61 Index

  • Thinner and lighter than standard
  • Suitable for prescriptions between SPH -2.00 and -4.00, or +2.00 and +4.00

1.56 Index

  • Standard thickness
  • Recommended for prescriptions between SPH -2.00 and +2.00

Tip: For the thinnest, most comfortable lenses, choose the highest index that matches your prescription needs.

What Affects Lens Thickness?

Lens Index

Higher index, thinner lens.

Prescription Strength

Higher prescriptions require thicker lenses at the same index.

Frame Size

Larger frames need bigger lenses, which often increases thickness—especially with strong prescriptions.

FAQs: Prescription & Lenses

Yes, we offer a full range of prescription lenses. You can choose your preferred lens type and enter your prescription details directly when placing your order.

Yes, we do! To order progressive lenses, your prescription must include an ADD value.

ADD (Addition) indicates the additional magnifying power needed for reading or seeing up close, and is essential for making progressive lenses. 

Without the ADD value, we are unable to create progressive lenses for you. If you’re unsure where to find ADD on your prescription, it’s usually listed alongside your distance prescription details—feel free to reach out to us if you need help!

Absolutely. We partner with leading lens brands including ZEISS, Essilor, and Transitions. You can select these premium lenses directly on each product page when customizing your order.

When selecting your lenses, simply enter your prescription details manually—this includes SPH, CYL, AXIS, and PD. For progressive lenses, the ADD value is required.

We highly recommend using a prescription issued within the last year, as outdated prescriptions may not provide the most accurate vision correction.

PD (Pupillary Distance) is the measurement, in millimeters, between the centers of your two pupils. This number is essential because it tells us exactly where to place the optical centers in your lenses—so your vision is sharp and comfortable. Without your PD, your glasses may not give you the clear focus you need.

If your prescription doesn’t include PD, you can easily measure it at home using our printable PD ruler and step-by-step guide.

Yes, you can! We offer a wide range of non-prescription lenses with features like blue light blocking, anti-reflective coatings, and more. Simply select the options you need when customizing your lenses.

We provide a variety of lens types to suit different needs, including standard single vision, progressive, reading, and non-prescription lenses.

Within each prescription category, you can choose from a range of functional upgrades:

  • Standard clear lenses: High-quality, everyday clear lenses.
  • Blue-violet light filtering lenses: Reduce exposure to blue-violet light from screens and sunlight.
  • Anti-reflective lenses: Minimize glare and eye strain, ideal for screen use, reading, and night driving.
  • Fog-free + blue light lenses: Stay fog-free while protecting your eyes from blue light—great for any activity.
  • High-performance gaming lenses: Enhanced clarity and protection from intense blue and UV light.
  • Photochromic & blue-violet light filtering lenses: 2-in-1 lenses that automatically darken outdoors for maximum convenience.

For the same prescription, we offer multiple lens thickness options. The final edge thickness depends on your frame shape and your PD. Generally, a higher lens index (such as 1.67 or 1.74) results in thinner and lighter lenses. Here’s a quick guide:

Basic Index 1.56

  • Up to 15% thinner and lighter than conventional plastic lenses.
  • Best for prescriptions up to ±2.00 diopters.
  • Recommended for mild prescriptions.

Standard Index 1.61

  • Up to 25% thinner and lighter than conventional lenses.
  • Best for prescriptions up to ±4.00 diopters.
  • Recommended for mild to moderate prescriptions.

Premium Index 1.67

  • Up to 40% thinner and lighter than conventional lenses.
  • Ideal for prescriptions from ±4.00 to ±6.00 diopters.
  • Recommended for moderate to high prescriptions.

Excellence Index 1.74

  • Up to 60% thinner and lighter than conventional lenses.
  • Best for prescriptions above ±6.00 diopters.
  • Recommended for high prescriptions.

We offer a range of thickness options so you can choose the best fit for your needs. If you have further questions, our team is always happy to help!

Most prescription orders are crafted in our EYDIO lens lab within 1–5 business days. For stronger prescriptions or high astigmatism, production may take a bit longer—usually up to 3–7 days.

No, there’s no additional fee for high prescription lenses. All our lens options are clearly priced, so you can select what you need without worrying about hidden costs.

All clear—let’s find your frames!

With your ideal lens index in mind, you can now browse our curated selection of optical frames for every style and face shape.