The third was how they could consistently manufacture the product to ensure commercial scale-up. In other words, the molecules needed to be strong enough to block out light, but without turning as dark as sunglasses and effectively changing the wearer’s eye-colour.
#Clinical try of beyond contact lenses how to#
The second was how to achieve the optimum concentration of molecules to deliver the visual benefit, while still looking good on the eye. “This contact lens provides a dynamic photochromic filter that helps to continuously balance the amount of light entering the eye, helping the eye manage different types of light and varying intensities of brightness throughout the day.” “In the US, about two thirds of consumers indicate being bothered by bright or harsh lighting conditions daily,” says Dr Zohra Fadli, director of Sphere & Light Management at Johnson & Johnson Vision, who oversaw research and development. While not intended as a replacement for sunglasses, they do lead to faster photostress recovery (vision recovery after exposure to bright light), less squinting and improved colour contrast. The lenses, which also provide vision correction, help the eyes adjust to darkness or brightness better than they would do on their own.
The lenses feature a light intelligent technology, dispersed across the material in the form of trillions of photochromic molecules. Would you like to talk to someone here at Woodhams about your contact lenses or other options? Enter your information below and one of our patient care advocates will reach out to you or you can call us at 77.In April, Johnson & Johnson Vision announced the launch of its first-of-a-kind new contact lenses, ACUVUE OASYS with Transitions. That risk, however small it may be, should be enough of a reason to heed the contact lens expiration date. This means that there is a good chance that the packaging has been compromised, allowing contamination to enter.īacteria, fungi, and amoebae can cause serious eye infections that can lead to blindness. If a contact lens has survived the long shelf life before its marked expiration date, it has probably received some abuse-perhaps from being left in the bottom of a bag or crammed into a car glovebox. With an unstable pH (acidity), "the lens, when the solution expires, can cause infection and become very uncomfortable." The solution containing the lenses can go bad, they explained-specifically, it can become more acidic or more alkaline (basic). The doctors confirmed that you should definitely not use expired lenses. The Huffington Post posed the question of expired lens safety to eye doctors representing the American Academy of Ophthalmology and the American Optometric Association. In this preliminary study, the researchers did find some contamination in expired lens packs, but they were unable to make any broad claims due to a very small sample size (their stated goal was more to spark further study than to answer the question authoritatively). These were the two things tested for in a study published in The South African Optometrist about the safety of expired lenses. The most serious concern is that poorly sealed packaging could allow bacterial and fungal contamination into the solution. What can happen to the lenses after the expiration date? Essentially what it means is that the lenses, and the solution that contains them, have only been tested for that period of time, which is then used to set the expiration date to stamp on each package.īeyond those expiration dates, the manufacturer cannot guarantee that the lenses are safe to wear. Contact lens manufacturers are required to demonstrate, through tests, that their lenses with solution blister packs will remain stable and safe for a certain period of time, for example, perhaps five years. Food and Drug Administration (FDA), which regulates contact lenses and other medical devices, requires rigorous safety and efficacy testing on such products. What the Contact Lens Expiration Date Means But while the reasons behind it might not be clear, obeying the expiration date is an important part of safely wearing contact lenses. Chances are high that you rarely look at that date, for a few reasons: it's just one of a bunch of numbers on a small package, it's not clear why it matters, and generally the dates are so far into the future that regular wearers use all of their lenses long before the date. A contact lens expiration date is marked on every individual lens package.