• O'S OPTICAL Duo Black alloy cat-eye magnetic clip-on glasses set, angled view
  • Model wearing O'S OPTICAL Duo Black alloy cat-eye magnetic clip-on glasses and holding the sun clip
  • O'S OPTICAL Duo Black alloy cat-eye magnetic clip-on sunglasses, front view
  • O'S OPTICAL Duo Black alloy cat-eye magnetic clip-on sunglasses, side view
  • O'S OPTICAL Duo Silver alloy cat-eye magnetic clip-on sunglasses, front view
  • O'S OPTICAL Duo Silver alloy cat-eye magnetic clip-on sunglasses, side view
  • O'S OPTICAL eyewear packaging with glasses case, pouch, cloth, and card
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O'S OPTICAL

Duo

Duo

Alloy Cat-Eye — Stylish Adaptability
HK$549.00 HKD
HK$785.00 HKD HK$549.00 HKD
Sale Sold out
Shipping calculated at checkout.
Color: Black
Lens Options

Prescription Options

Eye SPH CYL AXIS
Right (OD)
Left (OS)

No prescription on hand? No problem!

Please proceed to checkout and complete your order.

After placing your order, simply send a photo or PDF of your prescription to us via:

  • 💬 Chat Bubble (bottom right corner)
  • 📧 Email: osoptical.contact@gmail.com
  • 📱 WhatsApp

*Please include your Order Number in the message so we can match it to your lenses.

📦Free Shipping on all orders
Duo is a cat-eye magnetic clip-on glasses frame designed for everyday prescription wear and easy sun protection. The optical frame can be fitted with prescription lenses, while the detachable magnetic sun clip lets you switch from clear vision to shaded outdoor comfort in seconds. Its sleek alloy construction keeps the frame lightweight yet durable, and the cat-eye shape adds a refined, modern look for daily wear, commuting, travel, and changing indoor-outdoor light conditions.

Specifications:
• Weight: 27.6 g
• Lens Width: 53 mm
• Bridge Width: 18 mm
• Temple Length: 144 mm

View full details

Discover Our Eyewear Care & Service

Online Prescription Glasses Process

Choosing the Right Lens

Selecting the right lens index depends on your prescription strength (diopters). 
  • 0 to -2.00 diopters (mild prescription): 1.56 index recommended
  • -2.00 to -4.00 diopters (moderate prescription): 1.61 index recommended
  • -4.00 to -6.00 diopters (strong prescription): 1.67 index recommended
  • Above -6.00 diopters (very strong prescription): 1.74 index recommended
Important Note:
* Prescription strength may also be shown as “sphere (SPH)” in your eye test results. For example, -2.00 SPH ≈ -2.00 diopters
* No Prescription (Frame Only): Your glasses will arrive with acrylic demo lenses. These lenses may feature printed brand specifications and are intended solely to maintain the frame's shape. They are not designed for daily wear. We recommend visiting a local optician to have them replaced
* CR39 Index Options: If you select any CR39 option (1.56 - 1.74), your glasses will arrive with premium, crystal-clear optical lenses. These are custom-fitted, free of any printing, and ready for immediate wear

Protected & Thoughtfully Packaged

FAQ

Can I add prescription lenses to these frames?

Yes. Most O'S OPTICAL frames can be fitted with prescription lenses, except for selected sunglasses styles. If you are not sure whether a frame supports prescription lenses, please contact us before placing your order.

Can I send my prescription after ordering?

Yes, absolutely. You can provide your prescription details after placing your order. To ensure accuracy, simply send a clear copy of your optical prescription along with your order number through any of the following channels:

  • Email: osoptical.contact@gmail.com
  • Live Chat: Located in the bottom right corner of our website
  • WhatsApp: +852 6444 2918

How long does shipping take?

Standard shipping generally takes 5 to 15 business days. Our products are dispatched directly from our facilities in Hong Kong or mainland China. If your order includes customized prescription lenses, please allow an additional 3 business days for our opticians to precisely craft and fit your lenses before the order is shipped.

What if the glasses do not fit?

We offer a 30-day return and exchange policy. If you purchase sunglasses or non-prescription frames, you can return or exchange them within 30 days of receipt, provided they have no obvious signs of wear and are in their original condition.
However, please note that prescription lenses are custom-made to your specific visual requirements; therefore, they are non-refundable and cannot be exchanged once crafted. If you experience any issues with the fit or your new prescription, please reach out to our customer service team, and we will gladly assist you in finding a solution.

Product FAQ

1. How do magnetic clip-on glasses work?
Magnetic clip-on glasses include a regular optical frame and a detachable sun clip. You can wear the frame indoors as prescription glasses and attach the magnetic clip outdoors for sun protection.

2. Can magnetic clip-on glasses be fitted with prescription lenses?
Yes. The main optical frame can be fitted with prescription lenses. The magnetic clip is used as a sun cover, allowing you to switch between clear prescription glasses and sunglasses-style protection.

3. Are magnetic clip-on glasses good for travel?
Yes. Magnetic clip-on glasses are convenient for travel because they combine everyday prescription glasses and sun protection in one frame system. They are useful for customers who do not want to carry a separate pair of prescription sunglasses