How to Choose the Right Water Content for Contact Lenses?

The water content of contact lenses refers to the percentage of water within the lens material, which is usually indicated on the product packaging. Annual or semi-annual lenses typically have a water content between 38% and 42%, while daily disposable contact lenses can reach 50% or even over 60%. So, how do you choose the right water content for your contact lenses?

Water content is crucial for contact lenses as it can directly or indirectly affect many parameters of the lens. The higher the water content, the better the lens can transmit oxygen, and the more breathable it is. High water content also makes the lens more hydrated, more comfortable to wear, and softer in material.

However, it’s important to note that higher water content isn’t always better. On one hand, lenses with high water content may be more prone to accumulating deposits, making them harder to clean, and they can also become more easily damaged or deformed over time. On the other hand, lenses with higher water content tend to evaporate water faster. Since contact lenses do not produce moisture, the lost water needs to be replenished by tears, meaning that higher water content lenses require more tear absorption, which can lead to dry eyes.

Based on individual circumstances and wearing habits, we recommend that those with low tear production and easily dry eyes choose low water content lenses, while those with high oxygen needs may prefer high water content lenses with shorter replacement cycles. Additionally, because high water content lenses are softer, extra care should be taken when handling them.

When choosing contact lenses, it’s important not to focus solely on a single parameter. To ensure comfort, hydration, and clear vision, it’s essential to choose lenses with the appropriate water content that matches your needs.