Shop By Water Content
How the water content percentage affects your lens' comfort in the eye
Contact lenses with a higher water content tend to be thicker, which can make them more noticeable in the eye and potentially less comfortable to wear. In contrast, mid-water content lenses are thinner and more widely worn, offering a good balance of comfort and performance. The overall design of the lens, as well as the smoothness of its edges, can also impact comfort. Smooth, rounded edges can help to reduce irritation or discomfort, while certain materials may help to keep the lens moist and comfortable during wear.
Are Higher Water Content Contacts Better For Dry Eyes?
Contrary to popular belief, high contact lens water content may not be the best choice for people with dry eyes. These contact lenses can draw moisture from the eye, increasing the risk of dehydration and discomfort. They may also be more susceptible to drying out due to environmental factors such as screen use and air conditioning. In contrast, lower water content lenses may be more comfortable and less drying for people with dry eye syndrome.
Another factor to consider is the oxygen permeability of the contact lens material. Soft contact lenses, made from hydrogel or silicone hydrogel, can sometimes limit oxygen flow to the eye and contribute to contact lens-induced dry eye (CLIDE). Silicone hydrogel lenses are a good choice for people with sensitive eyes because they allow more oxygen to pass through the material, helping to keep the eyes healthy and hydrated. Gas permeable contact lenses, which do not contain high water content, are also classified according to their oxygen permeability (measured by the DK/t value).
Your optometrist or eye care provider can help you determine the best contact lens for your needs, taking into account your eye health and any specific concerns you may have. A good eye care routine, including regular lens cleaning and the use of eye drops as needed, can also help to alleviate dry eye symptoms. If you are experiencing dry eye discomfort, it may be helpful to complete a dry eye quiz or consult with an eye care professional.
What's The Right Water Content For Contacts?
The water content of a contact lens can vary depending on the type of lens. Soft contact lenses, which are made from a flexible, hydrophilic material, are available in three categories based on their water content: low (less than 40%), medium (50-60%), and high (more than 60%). The water content of a contact lens can impact its thickness, comfort, and performance. Lenses with a higher water content may be more moisturizing and comfortable, but they may also be thicker and more noticeable in the eye. Lenses with a lower water content may be thinner and less noticeable, but they may not be as moisturizing and may not be suitable for people with dry eyes. The best choice for you will depend on your individual needs and preferences, as well as the recommendations of your eye care professional.
What Is The Material That Soft Contact Lenses Are Made Of?
Soft contact lenses are made of a type of plastic called hydrogel, which is a water-loving material that is pliable and soft. Hydrogels absorb water to keep the lens material flexible and comfortable to wear. Another type of plastic used in soft contact lenses is silicone hydrogel, which is a combination of silicone and hydrogel. These lenses are popular because they allow for increased oxygen transmissibility, meaning that they can transmit up to six times more oxygen to the cornea. This makes silicone hydrogel lenses safe for extended continuous wear and can help to reduce the risk of hypoxia, a condition in which the cornea is not getting enough oxygen.