Continuous wear contact lenses: a simple choice
Contact lenses are a popular choice for those who need vision correction. Not only do they ensure that you see clearly, but they don't have an affect on your appearance or your lifestyle the way that eye glasses do.
But for many people, lenses that require constant care - cleaning, soaking and disinfecting - can take up too much time. After all, we have plenty to think about every day without having to deal with lens maintenance too!
That's why continuous wear contact lenses are a favourite option for anyone who needs help with their vision. Also known as extended wear lenses, these contacts make cleaning solutions a thing of the past and provide a hassle-free way to improve your vision.
The Benefits of Extended (Continuous) Wear Contact Lenses
Of course, one of the main benefits of continuous wear contact lenses is their convenience. Simply put them in at the beginning of the month, and change them up to 30 days later. In the meantime, you needn't worry about cleaning, disinfecting or removing your lenses for any reason and you can rest assured that your eyes will see clearly and be healthy. Continuous wear contacts are also extremely comfortable. They are generally made of a soft material called silicone hydrogel, which conforms to the shape of your eye and maintains a high level of moisture, so you never have to worry about dry red eyes. Silicone hydrogel is also a gas permeable substance. This means that oxygen can travel through the lenses to your eye, which is important for ocular health.
And since you don't have to worry about the various cleaning solutions or residue build-up that are common with re-useable contacts, continuous wear lenses are often a better choice for those who suffer from allergies or sensitive eyes.
There are also certain occupations that rely on good vision immediately on waking like Firefighters, Doctors, Emergency Responders or Nurses that can beneift form the advantage of waking up and not searching for glasses or regular contact lenses.
Are Extended Wear Lenses Prescribed as Often as they Were?
Extended wear lenses reached a peak 15 -20 years ago, when there were few lens choices available.
Today, with a lot more lenses to choose from, Optometrists more commonly prescribe daily lenses. Part of the reason was the worry of reducing the amount of Oxygen to the cornea when extended wear lenses were worn overnight, and the possible long term problems that this can create - in particular a dangerous condition that only affects certain people called neovascularisation.
What Kinds of Continuous Wear Lenses are Available?
With the ongoing improvements and developments of extended wear contacts, these lenses are now available in a huge range of types, enabling just about anyone to enjoy this simple and maintenance-free vision treatment.
Today, continuous wear lenses can be used to correct nearsightedness or farsightedness . Specialised lenses are also available for conditions that are a bit more difficult to treat, such as astigmatism and presbyopia. Typical examples are Purevision 2 HD or Airoptix Night & Day Aqua.
What is the Best Extended Wear Contact Lens?
Based on customer reviews from a variety of sources we have narrowed the field down to a few great lenses:
- Air Optix Night and Day Aqua - Given mostly five star reviews by customers, with all day wear and overall comfort levels rating very highly. This is the brand most commonly prescribed by Optometrists, mainly because of it's extremely high Oxygen transmissibility. Dk/t is a number that represents how much oxygen can pass through the material of the contact lens. The higher the Dk/t, the better it is for overnight wear and for Air Optix Night&Day Aqua the Dk/t is very high at 175 @ -3.00 Dioptres thickness.
This lens is FDA approved for 30 days continuous use.
- Purevision 2 HD - More of a mixed bag of reviews with a lot of customers preferring the previous version of this lens Purevision, which was discontinued by Bausch & Lomb. Nevertheless, those customers that did get on with it reported comfort through the month with little protein or other deposit build up. It also rates highly for precision aspheric optics giving good vision. This lens is FDA approved for 30 days wear and has a DK/T of 130 @ -3.00 Dioptres.
- Biofinity - This lens has been around the longest - but it has a very loyal following of customers who rate it very highly for comfort and in particular if they have dry eyes. This lens is mostly used for daily wear, meaning that it is removed each night, but it can also be prescribed for Extended wear and has a DK/T of 116 @ -3.00 Dioptres. However the FDA only approved this lens for 6 days use before removal for one night, and then a further 6 days overnight. A lot of Optometrists think this is a good idea anyways, as it gives your eyes a chance to breathe normally while sleeping for 1 night a week.
- Acuvue Oasys - This is a super popular brand of contact lenses manufactured by Johnson & Johnson. It is mostly prescribed as a two week lens by Optometrists, but, although it is not often prescribed as an extended wear contact lens, it is FDA approved for 7 days use. It has a higher DK/T of 147 @ -3.00 Dioptres.
Getting Continuous Wear Lenses
If you're interested in switching to continuous wear contact lenses, you should first discuss your situation with your eye care professional. They will assess your situation and help you to decide if they are the right option for your lifestyle and vision requirements. Continuous wear lenses, because they are in your eyes 24 hours a day, need careful fitting by an Optician to make sure the lenses are suitable for your eyes.
You should also remember to get your eyes checked on a routine basis to ensure your needs don't change. Depending on your age and other circumstances, you may even be eligible for a free eye exam on the NHS.
Once you're ready to purchase extended wear contact lenses, we are sure to have what you're looking for. We've been providing corrective lenses for many years and we work hard to provide excellent customer support and products from the most respected manufacturers.
Author: John Dreyer Optometrist Bsc(Hons), MCOPTOM, DipCLP
Created: 24 Apr 2015, Last modified: 4 Mar 2020