Compact mode

FlexGuard Rimless vs Tokai UV420 vs Hoya Sync III

Table of content

Lens Specifications Comparison
General Information Comparison
Facts Comparison

Optical Properties Comparison
Usage Comparison
Manufacturing Comparison
Features Comparison
Performance Scores Comparison

Lens Specifications Comparison

Lens Type 👁

The category of lens based on its intended use and visual correction purpose

FlexGuard Rimless

Flexible

The lens type of FlexGuard Rimless is Flexible. Lenses made from bendable materials for increased durability and comfort

Tokai UV420

UV Protection

The lens type of Tokai UV420 is UV Protection. Lenses that shield eyes from harmful ultraviolet rays, enhancing eye health and comfort

Hoya Sync III

Digital Eye Strain Relief

The lens type of Hoya Sync III is Digital Eye Strain Relief. Lenses designed to alleviate discomfort caused by prolonged digital device use Click to see all.
Material 🧬

The primary substance used in manufacturing the lens

FlexGuard Rimless

Polycarbonate

The material of FlexGuard Rimless is Polycarbonate. Polycarbonate lenses are impact-resistant and lightweight, ideal for sports and children's eyewear.

Tokai UV420

Trivex

The material of Tokai UV420 is Trivex. Trivex lenses combine lightweight comfort with high impact resistance, suitable for rimless frames.

Hoya Sync III

Plastic

The material of Hoya Sync III is Plastic. Plastic lenses are lightweight, durable, and cost-effective, making them a popular choice for eyewear.
Lens Coatings 🧱

Protective and enhancing treatments applied to eyeglass lenses, improving durability and visual clarity.

For all*

Anti-Reflective

Lenses with a coating that reduces glare and reflections, improving visual clarity and aesthetics.

Scratch-Resistant

Scratch-resistant coatings protect lenses from everyday wear and tear

UV Protection

UV protection coatings block harmful ultraviolet rays for eye health

Tokai UV420

Blue Light Filter

Tokai UV420 has Blue Light Filter coatings. Lenses with a coating that reduces exposure to blue light from digital screens, potentially reducing eye strain. Click to see all.

Hoya Sync III

Blue Light Filter

Hoya Sync III has Blue Light Filter coatings. Lenses with a coating that reduces exposure to blue light from digital screens, potentially reducing eye strain. Click to see all.

General Information Comparison

Price 💰

Price of the eyeglass lenses in USD, indicating the cost for a pair of lenses.

FlexGuard Rimless

160 $

The price of FlexGuard Rimless is $160.

Tokai UV420

100 $

The price of Tokai UV420 is $100.

Hoya Sync III

150 $

The price of Hoya Sync III is $150.
Price Range 💱

Classification of eyeglass lenses based on price ranges, helping customers find options within their budget.

For all*

$100-$200
Known for 💡

A unique feature or characteristic that distinguishes the eyeglass lens from others.

FlexGuard Rimless

Flexibility And Durability

FlexGuard Rimless is known for Flexibility And Durability.

Tokai UV420

UV Defense

Tokai UV420 is known for UV Defense.

Hoya Sync III

Eye Relaxation

Hoya Sync III is known for Eye Relaxation.

Facts Comparison

Interesting Fact 🧐

An intriguing or lesser-known fact about the eyeglass lenses or their technology.

FlexGuard Rimless

Can bend up to 90 degrees without breaking

Tokai UV420

Tokai UV420 lenses can block UV rays up to 420nm wavelength.

Hoya Sync III

Sync III lenses have a 'boost zone' to support eye focusing muscles.
Sarcastic Fact 😉

A humorous or sarcastic observation about the eyeglass lenses.

FlexGuard Rimless

Flexible enough to fit your changing moods

Tokai UV420

These lenses are like sunscreen for your eyes - but you don't have to reapply every 2 hours!

Hoya Sync III

These lenses work so hard to relax your eyes they might need their own vacation.

Optical Properties Comparison

Index of Refraction 💡

The measure of how much light is bent when passing through the lens

FlexGuard Rimless

1.59

The index of refraction for FlexGuard Rimless is 1.59. Click to see all.

Tokai UV420

1.53

The index of refraction for Tokai UV420 is 1.53. Click to see all.

Hoya Sync III

1.6

The index of refraction for Hoya Sync III is 1.6. Click to see all.
Index of Refraction Type 📊

Classification of the lens based on its refractive index

FlexGuard Rimless

Mid Index

The index of refraction type of FlexGuard Rimless is Mid Index. Versatile lenses balancing thickness and cost for moderate prescriptions. Click to see all.

Tokai UV420

Low-Index

The index of refraction type of Tokai UV420 is Low-Index. Basic lenses suitable for mild prescriptions, offering affordability and durability. Click to see all.

Hoya Sync III

Mid-Index

The index of refraction type of Hoya Sync III is Mid-Index. Balanced lenses offering improved thinness for moderate prescriptions at a reasonable cost. Click to see all.
Prescription Type 👓

Types of vision correction the eyeglass lenses are designed to address.

For all*

Nearsightedness (Myopia)

Lenses that correct close vision, allowing clear focus on distant objects and improving overall sight.

Farsightedness (Hyperopia)

Lenses that correct distant vision, allowing clear focus on far objects and improving near vision.

FlexGuard Rimless

Astigmatism

FlexGuard Rimless is designed for Astigmatism prescriptions. Specialized lenses that correct vision distortion caused by an irregularly shaped cornea or lens.

Presbyopia

FlexGuard Rimless is designed for Presbyopia prescriptions. Lenses that address age-related near vision difficulties, providing clear focus at multiple distances.

Tokai UV420

All Types

Tokai UV420 is designed for All Types prescriptions. Versatile lenses suitable for various vision needs, offering clarity across different prescription requirements.

Usage Comparison

Manufacturing Comparison

Made In 🌍

The country of origin or manufacture for the eyeglass lenses.

FlexGuard Rimless

South Korea

FlexGuard Rimless is made in South Korea. Innovative lenses from South Korea, known for advanced technology and quality

Tokai UV420

Japan

Tokai UV420 is made in Japan. High-tech lenses from Japan, known for precision and advanced materials

Hoya Sync III

Japan

Hoya Sync III is made in Japan. High-tech lenses from Japan, known for precision and advanced materials

Features Comparison

Pros 👍

Advantages and positive features of the eyeglass lenses.

FlexGuard Rimless

Highly Flexible

Shatter-Resistant

Lenses designed to withstand impacts without breaking into sharp pieces, enhancing safety.

Lightweight

Lenses that are exceptionally light, providing comfort for extended wear.

Highly Impact-Resistant

Ideal For Rimless Frames

Tokai UV420

Blocks Harmful UV Rays

Lenses that effectively filter out harmful ultraviolet radiation, protecting eyes from sun damage.

Lightweight

Lenses that are exceptionally light, providing comfort for extended wear.

Blocks Up To 420Nm Of Blue Light

Specialized lenses that filter out blue light wavelengths up to 420nm, potentially reducing digital eye strain.

Reduces Eye Strain

Blocks Up To 420Nm Of UV Light

Impact-Resistant

Lenses that can withstand impacts, reducing the risk of shattering and eye injuries.

Hoya Sync III

Reduces Eye Fatigue

Lenses that minimize visual stress and tiredness during prolonged use.

Supports Natural Focus

Alleviates Eye Fatigue

Specialized lenses designed to reduce eye strain and fatigue, especially during prolonged screen use or detailed work.

Enhanced Near Vision

Improves close-up vision for tasks like reading, writing, and detailed work
Cons 👎

Disadvantages or limitations of the eyeglass lenses.

FlexGuard Rimless

Prone To Scratches

Lenses susceptible to surface damage, requiring extra care to maintain clarity and appearance. Click to see all.

Moderate Optical Clarity

Lenses offering average visual sharpness, potentially not ideal for those needing superior clarity. Click to see all.

Moderate Thickness

Lenses of average thickness, potentially noticeable in frames and affecting aesthetics. Click to see all.

Higher Price Point

Limited Prescription Range

Higher Cost Than Basic Lenses

More expensive than standard lenses, offering advanced features but at a premium price. Click to see all.

Tokai UV420

Limited Style Options

Slight Tint

Slight Yellow Tint

Higher Price Point

Slightly Thicker Than High-Index Lenses

Lenses marginally thicker than high-index options, potentially affecting aesthetics in certain frames. Click to see all.

Hoya Sync III

Slight Adjustment Period

Mid-Range Price

Moderately priced lenses, balancing cost and features but potentially lacking high-end benefits. Click to see all.

Pricey

Expensive lenses that may offer superior quality, but at a higher cost than standard options. Click to see all.

Limited To Specific Tasks