There have been tremendous advances in the colored contact lens segment of the contact lens market. Colored lenses are certainly of significant interest to many people around the world for cosmetic applications, but it is important to remember their utility in therapeutic applications as well. It is also important to always remember that some of the public view these contact lenses as “decorative”—nothing more than the use of makeup. It is critical that we remain vigilant in our education of the public that these lenses are medical devices. That said, if you haven’t focused on colored contact lenses in your practice, I encourage you to get out ahead of this curve given the significant interest that remains in our patient population.
Jason J. Nichols, OD, MPH, PhD
CooperVision Unveils Avaira Vitality Sphere and Toric Contact Lenses
CooperVision, Inc. announced the launch of Avaira Vitality in the United States. This superior version of its Avaira two-week contact lenses provides multiple benefits through a new silicone hydrogel material.
Avaira Vitality sphere and toric lenses are made from a new material (fanfilcon A), which features a higher water content (55%) as well as a high level of oxygen permeability and transmissibility, resulting in overall comfort for wearers, according to the company. UV protection has also been improved to Class I—the top rating—which means the lenses now block more than 90 percent of UVA and 99 percent of UVB rays.
Avaira Vitality sphere lenses feature powers from +8.00D to -12.00D; a modulus of 0.6MPa; a DK of 90; a Dk/t of 110; a base curve of 8.4mm; and a diameter of 14.2mm.
Like its predecessor, Avaira Vitality toric lenses feature CooperVision’s toric technology—Optimized Ballast Design—which provides stability and optimal visual acuity. They will be available in a power range of +8.00D to -10.000D, with cylinder options of 0.75D, 1.25D, 1.75D, and 2.25D in axes from 10° to 180° in 10° steps. They have a modulus of 0.6MPa, a DK of 90, and a Dk/t of 82. The base curve is 8.5mm and the diameter is 14.5mm.
CooperVision will begin distribution of Avaira Vitality sphere fit sets and lenses in the U.S. this August. Avaira Vitality toric will be available beginning in December in a limited parameter range. The full power range is planned for 2017.
Alcon’s U.S. Vision Care Appoints Davis to Lead Professional Relations
Alcon appointed JeanMarie Davis, OD, FAAO as Director of Professional Relations & Practitioner Partnerships as part of the U.S. Vision Care Professional Affairs team. In this role, Dr. Davis will work with leaders in the contact lens, lens care and ocular surface fields to create strategic alliances within optometry, ophthalmology and opticianry to help Alcon deliver better patient outcomes. Her responsibilities will include various educational and strategic aspects related to Alcon’s U.S. Vision Care business.
Davis brings more than 15 years of eye care experience to the role, having most recently served as Global Head, Vision Care Technical Training, within Alcon’s Global Performance Development team. She joined Alcon in 2011, and has served as a member of the extended Global Vision Care franchise leadership team.
Prior to joining Alcon, Davis owned an optometry practice in Miami, Florida, and was a clinical assistant professor at Nova Southeastern University’s College of Optometry. She also has a background in surgical co-management through experience in ophthalmology and laser surgery centers.
She earned a Bachelor of Science degree from Florida International University and a Doctor of Optometry degree from Nova Southeastern University College of Optometry.
Contamac Becomes Platinum Level Sponsor of the Scleral Lens Education Society
As manufacturer of the Optimum line of GP materials, Contamac announced the company’s support of the Scleral Lens Education Society (SLS) with Platinum level sponsorship. The Scleral Lens Education Society provides education for practitioners on the art of fitting scleral lenses though congresses, workshops, webinars and other educational mediums. In addition to practitioner education, the SLS works to support public awareness of the benefits and availability of scleral lenses.
In addition to the Scleral Lens Education Society, Contamac has supported educational programs and organizations at various levels over the years globally, including providing educational material and tools for practitioners and students, giving presentations at optometry schools as well as sponsorship of the Global Specialty Lens Symposium, the Contact Lens Society of America and numerous congresses throughout the world.
EyeYon Medical, an ophthalmic device company based in Israel, recently obtained U.S Food and Drug Administration (FDA) 510(k) clearance for its Hyper CL (Hioxifilcon D) Therapeutic Soft Contact Lens for Daily Wear. The lens is indicated for therapeutic use to promote corneal healing and relieve corneal pain by protecting the cornea during the treatment of acute or chronic pathologies, such as corneal edema, corneal erosions, entropion, bullous keratopathy and corneal dystrophies as well as post-surgical conditions.
The lens design includes two base curves and a peripheral groove with eight fenestrations. When worn, the Hyper-CL lens design creates a tear film reservoir between the corneal surface and the contact lens. The fenestrations improve tear mixing efficiency. According to the company, Hyper-CL’s design enables hypertonic drops to have a longer contact time with the cornea. This prolonged contact period enables hypertonic agents to draw water out of the cornea longer, offering better relief from corneal edema-related symptoms.
The lenses are currently only sold in Europe and Asia. EyeYon plans to begin marketing the two-week lenses in the United States in 2017. For more information, visit http://www.eye-yon.com/.
See Your Interesting Case Photo Here in the Next Issue
Have you seen an interesting case lately? Would you like to share it with your colleagues? An image from that case could appear in Contact Lenses Today in the coming weeks!
We welcome photo submissions from our readers! It is easy to submit a photo for consideration for publishing in Contact Lenses Today. Simply visit http://www.cltoday.com/upload/upload.aspx to upload your image. Please include a detailed explanation of the photo and your full name, degree or title, and city/state/country.
Taking Contact Lens Performance to the Next Level – Contact Lens Coatings to Improve Lens Wettability and Lower Protein Adsorption
Up until recently contact lenses have been developed to provide optimal vision performance, physiological response via oxygen transmission and wearing comfort. Efforts are now underway to take contact lenses to the next level via coatings, surface treatments and other technologies that will hopefully significantly improve performance further and reduce the likelihood of contact lens associated infection and inflammation among other things.
In a recent paper authors describe a simple "click" chemistry approach to surface functionalize HEMA based contact lenses with hyaluronic acid (HA), a carbohydrate naturally contributing to the wettability of the native tear film.1 A two-step preparation technique consisting of laccase/TEMPO-mediated oxidation followed by covalent grafting of hydrazide-functionalized HA via simple immersion resulted in a model lens surface that is significantly more wettable, more water-retentive, and less protein binding than unmodified pHEMA. All the while the lens maintained the favorable transparency, refractive, and mechanical properties of a native lens. The dipping/coating method developed by the researchers to covalently tether the HA wetting agent is simple, readily scalable, and a highly efficient route for contact lens modification.
This paper describes but one attempt at moving contact lens material science further ahead. We can look forward to efforts that will make contact lenses more comfortable, reduce depositing, perhaps create an antimicrobial surface and even incorporate “smart” technologies. The future is very bright and we all should be very excited about being involved in this ever evolving area of eye and vision care.
1. Deng X, Korogiannaki M, Rastegari B, Zhang J, Chen M, Fu Q, Sheardown H, Filipe CD, Hoare T. 'Click' Chemistry-Tethered Hyaluronic Acid-Based Contact Lens Coatings Improve Lens Wettability and Lower Protein Adsorption. ACS Appl Mater Interfaces. 2016 Aug 10. [Epub ahead of print]
OCULAR SURFACE UPDATE Katherine M. Mastrota, MS, OD, FAAO
OK. So I lurk on Facebook. I mostly peruse posted images and every once in a while will “thumbs-up” a post…every now-and-again, I will shyly comment.
Recently I ran across a singular, excellent corneal photo/case study posted on a group feed. Multiple colleagues commented on the image offering a nice differential diagnosis discussion. Lid wiper epitheliopathy (LWE) was suggested as the diagnosis for the corneal image.
I would like to use this wonderful forum to briefly review LWE.
The lid wiper is defined as localized portion of the marginal conjunctiva of the upper eyelid that is believed to spread the pre-corneal tear film during blinking.1 The lid wiper is located posterior to the Line of Marx (the mucocutaneous junction of the lid margin). Lid wiper epitheliopathy denotes staining of the lid wiper after instillation of vital dyes indicative of microtrauma, that is, increased friction between the lid wiper and ocular or anterior contact lens surface due to inadequate lubrication. Lid wiper epitheliopathy is a frequent finding when symptoms of dry eye are experienced in the absence of routine clinical findings.
Certainly LWE can be associated with corneal findings, however the LWE diagnosis ideally should be confined to lid margin findings, especially in cases with no other overt clinical signs that correlate with patient symptoms.
1. Korb DR, Herman JP, Greiner JV, Scaffidi RC, Finnemore VM, Exford JM, Blackie CA, Douglass T. Lid wiper epitheliopathy and dry eye symptoms. Eye Contact Lens. 2005 Jan;31(1):2-8.
Contact lens-induced papillary conjunctivitis (CLPC) is a common ocular allergic disease in contact lens wearers. In its more severe form, it can cause giant papillary conjunctivitis, resulting in contact lens intolerance and the need to discontinue the use of contact lenses. This review presents the pathogenesis, clinical manifestations and management guidelines of this common disorder.
Recent Findings: Different types of contact lenses are associated with differences in the severity of CLPC. Refitting patients with silicone hydrogel contact lenses or with daily disposable contact lenses may improve the signs and symptoms of CLPC. The recent introduction of the topical immunomodulatory agent tacrolimus in other severe allergic eye diseases may apply in suppressing the allergic inflammation in CLPC as well.
Summary: CLPC is a common ocular disorder in contact lens wearers, with a significant impact on the quality of vision. It should be promptly recognized by healthcare practitioners and managed by modifications of the types and wearing schedules of contact lenses, as well as novel treatment options with topical immunomodulators.
Solomon A. Allergic manifestations of contact lens wearing. Curr Opin Allergy Clin Immunol. 2016 Aug 11. [Epub ahead of print]