Medik8 C-Tetra Eye Lipid Vitamin C Radiance Serum bottle displayed on a white background with translucent serum droplets, highlighting its liquid texture.
Close-up of a woman’s face with eyes closed on a warm orange background. Text reads: ‘Promotes a visibly energised & youthful-looking eye area. Smooths the look of fine lines & wrinkles. Brightens the look of dark circles & discolouration. Nourishes the delicate eye area.’”
Medik8 Vitamin C eye serum shown on a warm orange background. Text reads: ‘Stabilised Vitamin C delivers powerful smoothing, brightening & antioxidant benefits. Vitamin E deeply nourishes and boosts vitamin C power for maximum results.’
A collection of four Medik8 vitamin C products displayed on white pedestals against a clean white background. Labels identify C-Tetra (facial serum for sensitive skin), C-Tetra Luxe (facial serum for supercharged results), C-Tetra Eye (for the eye area), and C-Tetra Facial Cream (moisturiser for new vitamin C users).
An infographic titled "HOW TO LAYER" outlining a four-step morning routine: Cleanse (Surface Radiance Cleanse), Tone (Press & Glow), Vitamin C (C-Tetra Eye), and Sunscreen (Advanced Day Eye Protect). Expert advice at the bottom recommends pairing C-Tetra Eye with C-Tetra Luxe face serum for maximum results.
Medik8 C-Tetra Eye Lipid Vitamin C Radiance Serum bottle stands in front of its white outer packaging on a clean white background.
Medik8 C-Tetra Eye Lipid Vitamin C Radiance Serum bottle displayed on a white background with translucent serum droplets, highlighting its liquid texture.
Close-up of a woman’s face with eyes closed on a warm orange background. Text reads: ‘Promotes a visibly energised & youthful-looking eye area. Smooths the look of fine lines & wrinkles. Brightens the look of dark circles & discolouration. Nourishes the delicate eye area.’”
Medik8 Vitamin C eye serum shown on a warm orange background. Text reads: ‘Stabilised Vitamin C delivers powerful smoothing, brightening & antioxidant benefits. Vitamin E deeply nourishes and boosts vitamin C power for maximum results.’
A collection of four Medik8 vitamin C products displayed on white pedestals against a clean white background. Labels identify C-Tetra (facial serum for sensitive skin), C-Tetra Luxe (facial serum for supercharged results), C-Tetra Eye (for the eye area), and C-Tetra Facial Cream (moisturiser for new vitamin C users).
An infographic titled "HOW TO LAYER" outlining a four-step morning routine: Cleanse (Surface Radiance Cleanse), Tone (Press & Glow), Vitamin C (C-Tetra Eye), and Sunscreen (Advanced Day Eye Protect). Expert advice at the bottom recommends pairing C-Tetra Eye with C-Tetra Luxe face serum for maximum results.
Medik8 C-Tetra Eye Lipid Vitamin C Radiance Serum bottle stands in front of its white outer packaging on a clean white background.
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C-Tetra® Eye

  • Brighten
  • |
  • Soothe
  • |
  • Smooth
Lipid Vitamin C Radiance Serum
This product is being discontinued soon and we wanted to give you time to stock up while stocks last.

Discover a visibly brighter, smoother, and energised eye area each morning with C-Tetra Eye.

Harnessing the proven age-defying powers of Medik8's C-Tetra facial serums, C-Tetra Eye is expertly designed to deliver powerful visible results while being lightweight, fast-absorbing and gentle enough for your delicate eye area.

Formulated with stabilised tetrahexyldecyl ascorbate, this eye-specialist vitamin C serum works to smooth the look of fine lines and wrinkles around the eyes while visibly brightening and deeply nourishing for a more revitalised eye appearance overall.

Please Note: Product packaging shown may be different to the product received due to regional variations
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Key Benefits
Fine Line Reduction

Visibly smooths fine lines and wrinkles around the eyes for a firmer, more youthful-looking eye area.

Vitamin C Power For Delicate Eyes

The stable formula delivers the renowned smoothing, brightening and antioxidant benefits of vitamin C while being gentle and lightweight enough for the delicate eye area.

Visibly Brighter & Awakened Eye Area

Works to visibly brighten the skin tone, improving the look of under eye darkness and discolouration.

How to Use

First-time use

If you're new to C-Tetra Eye, we recommend a patch test at least 24 hours before first use. Learn how to patch test here.


How To Use

After cleansing in the morning, apply a small amount across the brow bone and under-eye area - avoiding the eyelids.

Guide to Layering
Step 1: Cleanse
Medik8 Surface Radiance Cleanse tube displayed on a clean white background with a large, translucent gel texture smear. Text identifies it as a Resurfacing AHA/BHA Mangosteen Cleansing Gel in a 150mL size.
Morning
Evening
Surface Radiance Cleanse™
Select a Size
Step 2: Tone
Medik8 Press & Glow tonic bottle stands against a clean white background with translucent liquid droplets and a puddle, highlighting its watery texture. Text identifies the product as a 200mL
Morning
Evening
Press & Glow®
Select a Size
Step 3: Brighten
Morning
()
Step 4: Brighten
Medik8 C-Tetra Advanced bottle displayed on a clean white background with translucent serum droplets, highlighting its lightweight gel-serum texture.
Morning
C-Tetra® Advanced
Full Size (30ml)
Step 5: Protect
Advanced Day Eye Protect™
Morning
Advanced Day Eye Protect™
Full Size (15ml)
Step 6: Moisturise
Medik8 Advanced Pro-Collagen+ Peptide Cream jar stands against a clean white background, with the open top revealing a rich white cream texture. Text on the jar highlights
Morning
Evening
Advanced Pro-Collagen+ Peptide Cream
Select a Size
Key Ingredients
3% Stabilised Vitamin C (tetrahexyldecyl ascorbate)

A low-irritation form of vitamin C that delivers exceptional antioxidant protection against harmful free radical damage while brightening and supporting collagen production for a visibly even, more youthful-looking complexion.

Vitamin E

A powerful antioxidant that provides additional antioxidant protection against the ageing effects of free radicals. It also helps to boost the power of vitamin C for optimum visible results.

Full List of Ingredients
C-Tetra® Eye
Lipid Vitamin C Radiance Serum

Simmondsia Chinensis (Jojoba) Seed Oil, Cyclopentasiloxane, Cyclohexasiloxane, Tetrahexyldecyl Ascorbate, Tocopheryl Acetate, Citrus Grandis (Grapefruit) Peel Oil, Limonene, Citral, Linalool, Geraniol.

*Although we try our best to ensure this list of ingredients is accurate there may be product upgrades from time to time, or slight variants between different regions based on local laws, meaning the only definitive ingredient list is that which is printed on the product packaging.
  • No artificial fragrance
  • No synthetic colours
  • Paraben free
  • Alcohol free
  • Certified by the vegan society
Expert Recommended

"Leaves the eye area visibly youthful and awakened."

DANIEL ISAACS
Chief Product Officer
A circular headshot portrait of a man with light brown hair and green eyes, smiling neutrally. He is wearing a white lab coat with 'Medik8' embroidered on the pocket and a black button-up shirt. The background is white.

"Gentle...and layers well beneath make-up."

ROBERTA SCHROEDER
Ecommerce Editor - Harper's Bazaar

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Reviews

Frequently Asked Questions

What's the difference between C-Tetra Eye and C-Tetra / C-Tetra Luxe?
C-Tetra Eye is our stabilised vitamin C serum for the delicate eye area, while C-Tetra and C-Tetra Luxe are our stabilised vitamin C serums for the face. They work in perfect harmony to deliver vitamin C's renowned brightening, smoothing and antioxidant benefits across the face as well as the delicate eye area.
How do I use C-Tetra Eye alongside C-Tetra / C-Tetra Luxe?
After cleansing in the morning, apply C-Tetra Eye around the eye area. Follow by applying C-Tetra or C-Tetra Luxe across the rest of the complexion.
Can I use C-Tetra Eye alongside vitamin A formulas?
Absolutely. In fact we recommend it as part of our pioneering CSA Philosophy which champions vitamin C plus sunscreen by day, vitamin A by night as the simple secret to glowing, youthful-looking skin.
Can I use C-Tetra Eye if I'm pregnant or breastfeeding?
As a cosmetics company, we are unable to provide product advice in relation to medical conditions such as pregnancy. We would recommend discussing the ingredients with your GP or midwife before use. As general guidance, this product does not contain any ingredients which we would recommend to avoid during pregnancy, unless advised by your doctor.
C-Tetra® Eye
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