Why Doctors Prescribe Biofinity EW Contact Lenses
Your eye doctor prescribed Biofinity EW contact lenses, and you may wonder why he or she recommended this particular lens. Many doctors like Biofinity EW contacts because they allow more oxygen to reach your cornea than almost any other lens. Also, this product is FDA-approved for extended wear—a trait many people value in their contacts.
Most contact lens wearers can adjust to wearing Biofinity EW contacts for six nights before they remove their lenses, clean them, and take an overnight break. In some cases, optometrists and ophthalmologists prescribe a longer break, such as a full 24 hours, from contact lenses. They may also limit some contact lens wearers to less than six nights of continuous wear.
The front of your eye, the cornea, craves oxygen. Unfortunately, all contact lenses restrict oxygen flow. There are a few different ways to measure the amount of oxygen that reaches the cornea through a lens. One common measure is “oxygen transmissibility.” According to it’s manufacturer, CooperVision, Biofinity EW lenses oxygen transmissibility score is 160, which is very high. There are only a few lenses that score higher, according to their respective manufacturers. They include Alcon AIR OPTIX NIGHT & DAY AQUA (175) and Bausch+Lomb ULTRA (163). Oxygen transmissibility scores in the 150-175 range are only necessary for extended/continuous wear lenses. If you are using a lens you remove every day, lower oxygen transmissibility scores are fine. After all, your eyes get plenty of oxygen while your contacts are out.
Biofinity lenses were not extended wear lenses when they arrived on the scene in 2005. In 2008 the FDA approved Biofinity for extended wear, and doctors got in the habit of calling them “Biofinity EW” to distinguish their “extended wear” status. They entered a market that now includes some hefty competition including the Bausch+Lomb products PureVision2 and ULTRA, as well as Vistkon ACUVUE OASYS and Alcon AIR OPTIX NIGHT & DAY AQUA.
Is it Biofinity EW or just plain Biofinity?
The correct name is Biofinity, and that’s what you’ll see on the box. When the FDA approved Biofinity for extended wear, many doctors started writing Biofinity EW on prescriptions. If you order Biofinity EW lenses from SendMeContacts.com, we will send you Biofinity lenses, without the EW.