Photochromic & sun · Comparison
Photochromic vs Polarized Lenses: Which Should You Choose?
Both help in bright sun, but they solve different problems. This comparison explains what each lens actually does, which one works with a prescription, and how to decide based on how you spend your day.
Choose photochromic if you want one pair of prescription glasses that works indoors and darkens outside. Choose polarized if your main problem is glare off roads, water or car bonnets. At Manh Long Optical, polarized is sold as non-prescription sunglasses only, while photochromic can carry your prescription. They differ by purpose, not by which one is better.
TL;DR
- Polarized cuts horizontal glare from wet roads and water; photochromic does not filter that kind of glare.
- Photochromic darkens with UV and clears indoors, so it can replace separate glasses and sunglasses for everyday wear.
- Only photochromic is available with a prescription at this shop; polarized is non-prescription only.
- Photochromic prices here run from 350,000đ (Blick 1.56) to 16,380,000đ (ZEISS 1.74), depending on brand, index and coating.
- Many customers own both: photochromic prescription glasses for daily use, polarized sunglasses for driving or the beach.
- 350,000đ
- Lowest photochromic option (Blick, index 1.56)
- 16,380,000đ
- Top of the range (ZEISS PhotoFusion, index 1.74)
- Up to −15.00
- Widest sphere range listed (Chemi 1.67)
- Non-Rx only
- How polarized is sold at Manh Long Optical
Prices and ranges are from the shop's in-store price boards, photographed 2 September 2026. They can change by brand and over time.
In this article
Why people confuse these two lenses
Both lenses are sold as "sun" lenses, so it is easy to assume one is simply a better version of the other. In fact they work in completely different ways.
A polarized lens carries a fixed filter that blocks light reflected horizontally, the flat, blinding glare that bounces off tarmac, water or a car bonnet. It is always dark. A photochromic lens has no glare filter; instead it reacts to UV, darkening outdoors and clearing again in shade or indoors.
That difference matters more than any brand name: one lens is built to remove a specific kind of glare, the other is built to let a single pair of glasses do two jobs.
What to compare
- Prescription. Can the lens be made to your prescription, or will you need contacts underneath?
- Indoor wear. Can you keep the glasses on when you walk inside?
- Glare off roads and water. Does the lens remove reflected glare, or only reduce overall brightness?
- Everyday use. Could this be your only pair of glasses?
- Price. What does each cost at the shop, and what drives the difference?
Side-by-side comparison
Swipe the table sideways to see all columns →
| Option | Best for | Main strengths | Limitations |
|---|---|---|---|
| Polarized | Driving, riding, beach and water | Very effective against glare off roads and water | Fixed dark tint, not for indoors; non-prescription only here |
| Photochromic | One pair for all day, indoors and out | Available with a prescription; clears indoors | Does not filter horizontal glare the way polarized does |
Polarized pricing follows the shop's standard sunglasses pricing. Photochromic ranges from 350,000đ to 16,380,000đ by brand, index and coating.
1.Polarized lenses
Polarized lenses use a vertical filter to block horizontally reflected glare. Riders and drivers out in strong midday sun, and people who go to the beach often, usually notice the difference clearly: the road surface and the water look less blown out.
Main strengths
- Removes glare off wet roads, water and car bonnets
- Fixed tint that doesn't depend on UV level
- Priced like standard sunglasses
Limitations
- Non-prescription only at Manh Long Optical
- Too dark to wear indoors
- Short-sighted wearers need contact lenses underneath
Best forPeople who drive or ride a lot in daytime sun, or spend time near water.
Consider instead ifYou need your prescription in the lens and don't wear contacts. Photochromic or prescription-tinted sunglasses (page in Vietnamese) fit that need.
2.Photochromic lenses
Photochromic lenses darken automatically in sunlight through a reaction to UV, then clear again in shade or indoors. Because they can carry a prescription, one pair works as everyday glasses and doubles as sunglasses outdoors. Photochromic is also available in progressive lenses for people who need both near and distance vision.
Main strengths
- Can be made to your prescription
- Wearable all day, indoors and outdoors
- Wide price range, from 350,000đ
Limitations
- No dedicated filter for glare off road or water
- Darkness depends on UV strength at the time
- Takes a short while to clear after you come indoors
Best forAnyone who wears prescription glasses and moves between indoors and outdoors during the day.
Consider instead ifGlare off the road or water is what bothers you most. Polarized sunglasses handle that better.
Photochromic prices at Manh Long Optical
The three most popular photochromic brands in the lens range at Manh Long Optical are Elements, Essilor and Zeiss. Which one fits depends on budget and on your prescription, since each index covers a different sphere (SPH) range. For the Essilor range specifically, see what Essilor Transitions lenses cost.
Swipe the table sideways to see all columns →
| Brand | Line · index | Price (pair) | Sphere (SPH), minus |
|---|---|---|---|
| Blick | Photo Grey 1.56 | 350,000đ | to −5.00 |
| Rocky | Smart 1.56 | 688,000đ – 788,000đ | to −6.00 |
| Chemi | U6 PhotoBlue 1.56 | 980,000đ | to −6.00 |
| Nikki | Photo Grey 1.61 | 980,000đ | −2.00 to −6.50 |
| Elements | PhotoGrey 1.56 | 1,180,000đ | to −8.00 |
| Chemi | U6 PhotoBlue 1.60 | 1,480,000đ | to −10.00 |
| Elements | PhotoGrey 1.61 | 1,780,000đ | to −10.00 |
| Essilor | Transitions Classic 1.56 | 2,080,000đ | to −6.00 |
| Chemi | U6 PhotoBlue 1.67 | 2,400,000đ | to −15.00 |
| Elements | PhotoGrey 1.67 | 2,480,000đ | to −12.00 |
| Essilor | Transitions Classic 1.60 | 3,180,000đ | to −6.00 |
| ZEISS | PhotoFusion 1.56 | 3,688,000đ | to −4.00 |
| Essilor | Transitions Gen S 1.56 | 3,840,000đ | to −6.00 |
| Chemi | U6 PhotoBlue 1.74 | 4,180,000đ | −4.00 to −10.00 |
| ZEISS | PhotoFusion 1.60 | 5,888,000đ | to −6.00 |
| Essilor | Transitions Gen S 1.60 | 6,120,000đ | to −6.00 |
| Essilor | Transitions Gen S 1.59 Airwear | 6,420,000đ | to −6.00 |
| ZEISS | PhotoFusion DuraVision Gold 1.50 | 7,980,000đ | to −7.00 |
| Essilor | Transitions Gen S 1.67 | 8,280,000đ | to −10.00 |
| ZEISS | PhotoFusion DuraVision Gold 1.59 / 1.60 | 9,080,000đ | to −10.00 |
| ZEISS | PhotoFusion DuraVision Gold 1.67 | 10,980,000đ | to −12.00 |
| ZEISS | PhotoFusion DuraVision Gold 1.74 | 16,380,000đ | to −14.00 |
Prices per pair, single-vision, from the in-store price boards photographed on 2 September 2026; cylinder up to −2.00 on most lines. Ask in store for the current figure before ordering. Not sure which index your prescription needs? The lens index guide explains it.
How we compared them
This is a comparison by purpose, not a lab test. We did not run our own optical measurements. The comparison uses:
- Business infoManh Long Optical's current product range and list prices.
- ManufacturerTransitions Optical's explanation of how photochromic molecules react to UV.
- Professional bodyAmerican Academy of Ophthalmology guidance on UV and the eyes.
- Store experienceWhat customers at the counter typically ask about and choose.
Which should you choose?
- If you ride a motorbike or drive in the midday sun a lotPolarized sunglasses
- If you go to the beach or spend time near water oftenPolarized sunglasses
- If you need one prescription pair for all day, in and out of the sunPhotochromic
- If you're short-sighted and don't want to wear contactsPhotochromic
- If you do both: daily prescription wear plus regular driving or beach tripsPhotochromic glasses and a separate polarized pair
FAQ
Does photochromic get as dark as real sunglasses in strong sun?
Close to it, but how dark it gets depends on UV intensity at the time, so it darkens more at midday than in the late afternoon or on an overcast day.
Does the shop fit polarized with a prescription?
Not currently. Polarized lenses at Manh Long Optical are non-prescription sunglasses only.
Is there a delay when photochromic lenses go from outdoors back indoors?
Yes, anywhere from tens of seconds to a minute or two depending on brand and outdoor temperature. They don't clear instantly.
What's the lowest-priced photochromic option at the shop?
Blick at index 1.56 for 350,000đ, suited to a tight budget while still trying photochromic.
Can photochromic replace sunglasses for a beach trip or a long drive?
It reduces general brightness, but for glare off water or road surfaces, polarized still handles it better through its dedicated vertical filter, which photochromic doesn't have.
One thing to remember
Pick by the problem you want solved: polarized removes reflected glare, photochromic lets one prescription pair work indoors and out.
A note on health: Information here is for reference; prices and policy can change by brand and over time. Prescription glasses correct vision; they don't reduce a prescription or cure short-sightedness.
Sources
- ManufacturerTransitions Optical — How Photochromic Lenses Work. How the photochromic molecule reacts to UV.
- Professional bodyAmerican Academy of Ophthalmology — The Sun, UV Light and Your Eyes. Recommendations on UV protection in sunlight.