COSMEDIX Under Eye Serum for Dark Circles & Puffiness, Opti Crystal – Lifting & Firming Liquid Serum for Fine Lines & Wrinkles – Brightening, Moisturizing, & Hydrating Anti Aging Eye Puffy Bags Serum | ⭐ Flexiology.Store Recommended
$105.00 Original price was: $105.00.$76.75Current price is: $76.75.
🌿 Expert Tip: Handpicked for natural health, wellness & beauty.
Price: $105.00 - $76.75
(as of Oct 08, 2025 19:59:12 UTC – Details)
From the brand



BEST SELLERS




SKIN SERUM
FACE CLEANSER
Is Discontinued By Manufacturer : No
Product Dimensions : 3.81 x 1 x 0.44 inches; 0.2 ounces
Item model number : 931402010
Department : Unisex-Adult
UPC : 847137020200 847137052652
Manufacturer : COSMEDIX
ASIN : B01CPSP7PM
Best Sellers Rank: #67,744 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #168 in Eye Treatment Serums
Customer Reviews: 4.3 4.3 out of 5 stars 201 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Customers say
Customers find the eye serum effective for hydration, with one mentioning it works wonders on lines around the eyes. The product receives positive feedback for its quality, with one customer describing it as the most amazing under-eye product made, and they appreciate its pearl-like iridescent color. The serum lasts up to 6 months and is worth the price, though some find it expensive. Customers disagree on the ease of application and size, with one noting that a small amount is sufficient for both eyes, while others describe it as tiny. Several customers mention the product is sticky.
AI Generated from the text of customer reviews
🌿 Expert Tip: Selected by our Flexiology Experts for quality & value.
⚠️ Disclaimer: Information is for educational purposes and not a substitute for medical advice. Consult your physician before use. Flexiology.Store is not responsible for any adverse effects.
13 reviews for COSMEDIX Under Eye Serum for Dark Circles & Puffiness, Opti Crystal – Lifting & Firming Liquid Serum for Fine Lines & Wrinkles – Brightening, Moisturizing, & Hydrating Anti Aging Eye Puffy Bags Serum
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BrandyAL –
Magic
There is a learning curve to applying this eye serum but just to say, less is more. You don’t need much. I let it sit for a few minutes and then continue to tap it in. It is sticky but eventually sinks in. I’m an esthetician and have tried soooo many eye products and this one has impressed me the most as far as how quickly you see results. I’m 53 and when I wear eye makeup it sometimes settles into the inner corner wrinkles that are normal for my age. This eye serum has solved that issue. I look in the mirror stunned. I also think it helps prolong my eye makeup during the day and simply firms the delicate skin around the eyes. For now I’m only using this product during the day and another eye cream at night. This product is pricey but with how small of an amount you need, this will last you a good while. I will be recommending this to clients.
J. Plaia –
Worth it!
I am a huge fan of this under eye cream. I purchased it to address dark circles, and I have definitely seen an improved difference in the hydration and color under my eyes.. Easy to apply, just a small dab is enough for under both eyes. It is a thicker than other under eye creams, almost gel like, but it does not feel heavy at all. It gets completely absorbed into the skin. And there is no funky smell. It seems a little expensive, but the small tube lasts quite a long time and is definitely an effective product. I definitely recommend this Cosmedix under eye brightening cream.
みや –
really good!
This product is really good if you ask me. I bought it in march 2023, and I’ve been using it daily since then. The tube is TINY and it’s not cheap but I’ve been using it for 9 months so value seems ok? I’m not even out of it yet but I’ll reorder soon.I have basically no wrinkles under my eyes, and my skin is soft and moisturized there when I use it. I had some fine lines before but this product really works well.I see a lot of reviews talking about it being blue and shiny and the color not going away, as well as sticky, and not working with make up well. They may not be using it well because I have none of these problems.IMPORTANT: I use it in the morning before make up only. It will be sticky if you only use this.After washing my face, I mist with water and apply a vitamin C&E serum, followed by lightweight cica moisturizer all over. Once that dries, I squeeze 4-5 “flat dots” of COSMEDIX Opti Crystal Liquid Eye Serum under my eyes. I do this by squeezing a tiny bit and dabbing it directly onto my skin from the tube itself. I say “flat dots” because you need a small amount, not a blob of it. it’s super important not to use too much.After that I pat it out all over under my eye with my ring finger. Once it’s all spread out, if it’s still quite blue, you have too much. at this point I see a shiny/sticky appearance, but not blue or aurora.Next, I apply matte BB cream and use the same patting out technique under my eye until desired coverage is achieved.BB cream is then followed by mineral foundation powder and by this point there is zero stickiness, my make up holds up well throughout the day with no creasing and maintaining a smooth appearance.I hope this helps.
Kristin CupcaKes –
It didn’t do anything..
This product was disappointing. I run a beauty blog on Instagram, and I had seen someone I know and trust raving about this product. She mentioned she had gotten it free as PR of some sort, and that it retailed for $95, but it was amazing. I rushed over to Amazon to see if they had it, and they DID. It was only about $42 at the time, and I couldn’t believe the deal I was getting. I ordered it right then and there. I’ve had this for about 6 months or so, and I stopped using it long ago after not seeing results of any kind. Now I see that the price has gone up to $95 here as well. With that type of price point, I figured I’d share my experience. To be fair – everyone is different. I have heard good things about this product from other people. I however, did not get results, and wouldn’t have recommended it at $42, let alone $95.
Beverly –
Crema de ojos
Excelente producto y funciona
Amazon Customer –
Four Stars
GREAT PRODUCT – GOOD PRICE AND PROTECTIVE SHIPPING
Melodee D. –
This stuff is miraculous!!!
I first got this at a clinic that only uses organic or high quality products. I wasn’t sure at first that it was worth the money, but in no time, I had so many people commenting on my eyes. I stopped wearing concealer and my fine lines have greatly diminished. I have now been using this for over a year and I will not buy anything else. My 76 year old mother started using it and saw a huge difference under her eyes as well!
Amber Black –
That’s a big No!
I was intrigued by this product when I saw it. I’ve taken really good care of my skin, no matter what I do eyes age different. For reference I do have eyelash extensions and that’s a BIG reason this is a big no! After applying no matter how little it turns into a sticky fly trap. I couldn’t tolerate the sticky consistency and my lashes sticking to my lids if reformulated to a silky smooth non sticky substance then I may try again! Also makeup doesn’t mesh with this in the least.
S1972 –
UPDATE- I spoke to Cosmedix and they confirmed that it is legit product, plus Amazon replaced the one that arrived leaking. At this price the Opti Crystal is a bargain price. You only use a pinprick amount so it lasts for months and is a highly effective eye product. My review has now changed to 5 stars.Original review: I’ve purchased this product previously from a different retailer and know it’s great. But this Opti Crystal arrived with neither the tube or box protected with any kind of seal. The product has also leaked into the lid. It feels like someone has previously opened and tried it before returning. Either way it feels unhygienic. I’m returning and requested a replacement. I’m also going to check with Cosmedix on how it should be packaged. (Opti Crystal I’d usually around £90, so if legit this is a bargain price, or it could be too good to be true. I’ll update when I find out more from Cosmedix.)
Wendy –
I’ve used this product for years and it’s turned back the tide on crows feet – they are demonstrably less prominent now at 53 than they were at 47 when I started using it. Other reviews are true – you only need a tiny bit and it is quite sticky. I dot it under my eyes and leave for a minute while I do something else, give it a moment for body heat to kick in. Then dot it around the area – no dragging necessary if it’s warmed up a little. I don’t use skin coverage so I can’t comment how foundation or eye cream sits. I’m naughty and use twice a day and have to hold myself back from using more than I need. Tube last 4 months. RRP is around $180 but if you shop around, can get for $106-$115 to $140. Record was $98. This is a must have and I dread eventual retirement when I’ll have to face up to if I can afford it or not! I’ve tried other eye serums/creams which have done nothing but smell nice and be a bit moisturising.
Eva Medilla –
I have been using Opti Crystal for only 2 weeks, incorporated on my night time skin routine — the result has me pleasantly surprised and absolutely pleased! The skin under my eyes is now super smooth and visibly hydrated. No wonder the rave reviews for this product are kept coming. I used a few other eyecream brands before, nothing compares to Opti Crystal. It is the best and I am hooked 🙂
Stéphanie –
Il est dommage que pour le prix, la boite ne soit pas scellée ou qu’il n’y ait pas un opercule sur le tube. Impossible de savoir si le tube a déjà été ouvert (ce qui le rendrait efficace moins longtemps), ou si le produit n’a pas été testé (il pourrait manquer du produit). Au prix particulièrement élevé de la crème, nous devrions pouvoir être sûr qu’il soit neuf. J’ai vraiment un doute sur le mien car la pointe transparente est arrivée colorée par le produit. C’est dommage, car ce produit semble prometteur !
Ange –
This serum is very sticky to put on and pulls at the skin while you distribute it. I’ve found between using the serum and the CosMedix eye cream, my eyeliner is always smudged after a couple of hours. It did initially make the skin feel firmer but I won’t be buying it again.