Alcon has expanded its range of preservative-free eye drops for dry eye disease with the addition of Systane Complete Preservative-Free. 

Using Systane’s delivery system of hydroxypropyl-guar (HP-Guar) and borate in combination with nano-lipid technology to support all layers of the tear film, Alcon said the revised drop relieves the symptoms of all types of mild-moderate dry eye (aqueous deficient, evaporative and mixed dry eye) for up to eight hours.  

“Upon instillation, the HP-Guar and borate crosslink to form a viscoelastic meshwork, creating a ‘bandage’ over the ocular surface, preferentially binding to damaged areas of the cornea and increasing retention of the demulcents in the drop, for extended protection and lubrication.” 

The nano-emulsion is formulated with mineral oil and a patented anionic phospholipid delivered in lipid droplets, which according to Alcon facilitates migration to the top of the tear film to replenish the lipid layer and help stabilise the tear film. The bottle features Alcon’s patented PureFlow Technology, comprising a one-way valve to ensure no contaminated liquid is re-introduced into the container, plus a fine silicone membrane to filter returned air. The bottle also has a low squeeze force and features a blue tip to aid targeting of the eye for ease of instillation.