One pair, two looks. The Rongchy ED0009-BS features photochromic lenses that stay crystal clear indoors and darken to a smoke tint in sunlight — a slim round metal frame that works as eyeglasses and sunglasses in one.
How the Photochromic Lenses Work
The lenses react to ultraviolet light. Step outside and they begin to darken within seconds, reaching a comfortable smoke tint in bright sun; head back indoors and they fade back to clear. No swapping between glasses, no clip-ons to lose. On cloudy days you get a lighter tint, so your eyes stay comfortable in every condition. Note that most car windshields block UV, so the effect is reduced while driving.
Key Features
- Photochromic lenses — clear indoors, darken outdoors in seconds and fade back when the sun hides
- Blue light filtering — a built-in filter eases screen glare for all-day wear
- Retro round metal frame — slim, lightweight wire build that suits every face
- Three finishes — Black, Silver and Rose Gold
- Unisex fit — 132mm total frame width with 46mm round lenses
Frame Measurements
| Lens Width | 46 mm / 1.81 in |
| Lens Height | 50 mm / 1.97 in |
| Nose Bridge | 18 mm / 0.71 in |
| Frame Total Width | 132 mm / 5.20 in |
| Temple Length | 137 mm / 5.39 in |
Which Face Shapes Suit Round Frames
Round metal frames flatter square, rectangle and heart-shaped faces best — the soft curves balance strong jawlines and wider foreheads. Oval faces can wear almost any shape, including round. If your face is already quite round, an angular or wayfarer-style frame will add more contrast.
Care Tips
Clean the lenses with the included cloth and a drop of water; avoid alcohol-based sprays on the coating. Store the frame in its case rather than on your head — wire temples can bend out of shape. Keep them out of hot cars for long periods, as extreme heat can slow the photochromic response.
Frequently Asked Questions
Are these prescription glasses?
The lenses are non-prescription (plain) photochromic lenses, ready to wear out of the box.
How dark do the lenses get?
In direct sunlight they darken to a medium smoke tint. The stronger the UV, the darker they go.
Do they work in the car?
Partially. Most windshields filter UV, which the lenses need to trigger, so the tint stays lighter while driving.
What's in the box?
1 pair of glasses, a protective case and a cleaning cloth.
Stay outside longer — grab two finishes and match them to your mood.
Common questions
How do photochromic lenses work?
The lenses darken when UV light reaches them and clear again indoors, usually within 10 to 30 seconds in each direction. Because car windshields filter UV, they stay mostly clear behind the wheel.
Which colours can I order?
3 colourways are available: Black, Rose Gold, Silver. All colourways share the same lens specification, so the choice is purely about how the frame looks on you.
Is the Metal frame comfortable for all-day wear?
The metal frame keeps total weight low, and the nose pads sit flat instead of pinching. Wearers who spend hours at a screen or in a book usually notice the difference on the bridge of the nose first.
Does Rongchy ship free, and what about returns?
Every order ships free worldwide with tracked delivery and no minimum spend. If the fit or the strength is not right, you can return the pair within 30 days of delivery for a refund or exchange.
How should I clean and store the lenses?
Rinse under lukewarm water, dry with a soft microfibre cloth, and skip paper towels or clothing, which leave micro-scratches in the coating. Keep the pair in its case when it is not being worn.
