Many newcomers to contact lenses, often start wearing their first pair of contacts just because a friend recommends them or because of online marketing.
However, there are many things to look for in contact lenses. For example, the base arc, diameter, water content, oxygen permeability, etc. Sometimes foreign body sensations or other uncomfortable situations do not mean that you are not used to them, but rather that you have not properly understood the needs of your eyes.
Contact lens medical device classification
According to the medical device classification and management method, medical devices are divided into three levels, from the first level to the third level for low to high risk.
This is judged by the ease of use, time spent in contact with the body, and other factors. Contact lenses are classified as Level 2, which is a medium-risk medical device and represents a certain degree of danger if not handled properly.
Therefore, contact lenses are subject to some regulations and qualified lenses will have their medical device registration number. Please ensure that you are a qualified store and product, do not buy products from unknown sources for the sake of special models and colors or simply for cheap. After all, the eyes are quite fragile, and a careless mistake may cause irreversible damage.
Please feel free to purchase Freshlady contact lenses as they are CFDA, CE, and ISO13485 certified.
Parameters to look for before choosing contact lenses
Base Arc Size
In different brand series, it is common to find 8.4~9.0mm size, especially in Asia most contact lenses fall 8.5~8.7mm. If people with large curved eyes wear contact lenses with a base arc of 8.4mm, they are bound to experience foreign bodies and discomfort and are prone to eye injuries and diseases.
Oxygen permeability and silicone gel contact lenses
When contact lenses are worn on the eyes, it will largely limit the contact between the eyes and air-breathing, while sitting in the office you will be more likely to feel dry eyes because of the air conditioning, and over time the lack of oxygen and water in the eyes will become chronic dry eye disease, this time the contact lens oxygen permeability and water content is very important.
Simply put, choose contact lenses that contain less than 50% water, because high water content will absorb tears from the eyes and lead to dryness; In contrast, high oxygen permeability means choosing contact lenses with silicone gel to wear throughout the day, so that the eyes will not suffer from excessive oxygen deprivation and will ease the side effects of long-term contact lens wear.
However, if you have a dry eye condition, even if it is a high-oxygen permeable silicone contact lens, you still need to ask a professional if it is suitable for you.