The key difference between cosmetic contact lenses and regular lenses lies in the pigment layer that makes the iris appear brighter and more vibrant.
However, the popularity of cosmetic lenses has attracted unscrupulous individuals who flood the market with substandard lenses at low prices, causing eye injuries to many users.Rumors like "wearing colored contacts causes blindness" spread like wildfire, leaving many anxious about the risks and how to avoid harm.
First, it's crucial to understand that counterfeit lenses from unregulated manufacturers consist of only two layers of film. Pigment is simply brushed onto the inner layer and baked dry. Not only do the dyes fail to meet national safety standards, but the sloppy coloring process offers no quality assurance.The quality of the pigment composition and dyeing process in contact lenses is directly linked to the visual health of consumers.Substandard tinted lenses come into direct contact with ocular tissues. They may chemically react with tears, causing color bleeding that delivers toxic irritation to the cornea. This not only damages the cornea but also leads to corneal staining. It can easily trigger eye injuries such as conjunctivitis, corneal epithelial defects, or allergic reactions, potentially causing eye infections and varying degrees of ocular harm.
How can we prevent such harm? When selecting cosmetic lenses, always visit a reputable optician or hospital to undergo professional eye examinations and lens fitting. Choose genuinely safe and reliable cosmetic lenses. Never be tempted by cheap prices to purchase unverified lenses online. If buying online, only select products registered with the drug regulatory authority and holding a valid medical device registration certificate.
How can we avoid harm and protect our eyes? Just like clear lenses, cosmetic lenses can be worn safely and frequently as long as they meet the criteria of hygiene, health, sufficient oxygen permeability, thinness, softness, and comfort.
Specifically, this involves three key points:
1. Hygiene and Health: Choose cosmetic lenses made with genuine "sandwich" technology, and opt for shorter replacement cycles for better health.
2. Sufficient oxygen permeability: With the addition of a pigment layer, oxygen permeability becomes even more critical. Well-crafted cosmetic lenses feature pigment layers that do not compromise oxygen transmission.
3. Comfort: Opt for ultra-thin, soft cosmetic lenses for enhanced wearability. Additionally, some UV-protective cosmetic lenses offer extra sun protection.