DURATION: 1 DAY
Daily disposable contact lenses have several advantages, convenience being the first. Since these lenses require no care, cleaning or disinfection, they are very practical.
These lenses also provide certain key “ingredients” that professionals look for in high-performance lenses, including low turnover (useful for toric lenses), stability and high oxygen transmissibility.
Daily disposable lenses will reduce the risk of protein deposs, eye infections caused by lenses or the solutions used to clean them, and corneal ulcers. As they are replaced every day, the time for proteins and allergens, for example, to accumulate on the lenses and create deposits is reduced. Moreover, many of these lenses offer protection against UV rays, which is particularly indicated for athletic patients.
While it is believed that disposable lenses are expensive, they eliminate the need for a contact lens solution and do not require a protective case. That is why certain eyecare professionals assert that the difference in cost between disposable lenses and traditional lenses is minimal and is compensated for at least in part by less need for cleaning products.
DURATION: 2 WEEKS
Short-term lenses can be used for up to 2 weeks. This is the type of lens most used. They often represent the most economical option and a wide range of models, colours and functions is available.
This type of lens is easy to handle, but requires maintenance in the form of a cleaning liquid and a lens case. The lentils are inserted in the morning and removed in the evening. Once they are cleaned, they are placed in a case filled with cleaning solution overnight.
After two weeks, you must replace the lenses to avoid any risk of contamination.
DURATION: 1 MONTH
Monthly lenses offer many benefits. They are known for their comfort in the event of prolonged wear. Some monthly lenses can be worn for up to seven consecutive days without being removed.
Wearing lenses that are not approved to be worn during sleeping hours can pose a risk to your eyes as the lenses deprive your eyes of oxygen. These risks include corneal infections and corneal neovascularization, defined as a gradual infiltration of blood vessels into the whites of the eyes.
During the day, having your eyes open brings oxygen to your cornea. Monthly and extended wear lenses are generally made of silicone hydrogel which has a higher gas permeability: this material allows five times more oxygen, or even more, compared to ordinary lenses.
In addition, by opting for monthly lenses, you will have fewer lenses to buy. The overall cost of monthly contact lenses may be slightly lower than that of daily lenses because, in the end, you buy fewer lenses. You throw them out once a month rather than every day: you only need 24 lenses per year. For the eco-responsible wearer, this also results in a reduction in waste.