The UK’s only treatment which is clinically proven to work. For fiercer, stronger, more impactful lashes and brows
Opti Laboratories was founded by one of the UK’s leading experts in lash growth and care, Dr. Tom Walker. Over the last 2 decades Tom has helps tens of thousands of clients to restore their lashes and brows with innovative treatments and expert insight. Tom continues to lead our team of UK-based doctors, offering the best quality advice and products to help you achieve your lash and brow goals.
The only clinically-proven growth treatment available in the UK, for lashes that are 25% longer, 106% thicker and 18% darker. The treatment is clinically proven to be effective and is approved for cosmetic use by the FDA.
The growth treatment can be used as a natural-look alternative to lash extensions, or can be paired with extensions to offer protection against traction alopecia (excessive weight on the lash from extensions). Many clients find their lashes are so long and dark, they no longer even use mascara.
The treatment also works on the brow area; application to the fine vellus hairs of the face transforms them into thick “real” hairs. This is usually sufficient to fill in any gaps caused by over-plucking of the brow or by conditions such as hyperthyroidism.
The treatment is only available to purchase in the UK from Opti Laboratories.
Sun exposure is one of the primary causes of damage to your hair, including your lashes and brows. Even modest exposure in winter can break down cross-linked bonds, keratins and other proteins. This causes hair to be brittle and prone to breakage, particularly at the tip where the hair has experienced most exposure over time.
Our UK team of lash and brow growth experts have developed a world-first conditioning serum which shields your lashes and brows from the sun to protect them against sun-induced breakage. The serum also conditions for healthy growth, and contains anti-irritants and antioxidants to sooth your eye area. Sustained daily use offers protection from follicle to tip, allowing your lashes to achieve their fullest potential.
The serum also acts as the perfect primer for mascara and brow pencil by separating and straightening the individual hairs.
Opti Laboratories are proud to have had the Sun Protect Serum announced as a finalist in the 2025 Live That Glow Independent Beauty Awards.
“Lashes and brows are underrated—they’re the first things our subconscious notices when recognizing beauty in others and ourselves. It’s not just about length; it’s about health, strength, and impact.
Opti’s science-backed products actually work (tried and tested for over five years), delivering results that truly hit different – for everyone, regardless of gender. I love that these products focus on thriving, not just growing.”
Cultural Producer, Beauty Curator and TV Personality.
The Growth Treatment and Sun Protect Serum work with your natural lash and brow for a subtle, natural finish. If you’re looking for a higher impact look, or a thicker brow without the need for cosmetics or extensions, these products will deliver.
Our products are delivered in a discrete box with our classic, muted branding.
