Parameters You Must Know When Buying Colored Contact Lenses

Colored contact lenses are highly personalized products, and everyone needs to select lenses that suit their individual needs. Understanding the parameters of contact lenses can help us comprehensively understand their functions and characteristics, and can also greatly avoid discomfort and other issues when wearing them. Below, EyeCoo will introduce some knowledge about the parameters of contact lenses.

【Base Curve】represents the curvature radius of the contact lens, determining the curvature of the lens. A larger base curve indicates a flatter inner surface of the lens. Most Chinese people have a corneal curvature between 8.4-8.6. If the base curve of the lens you purchase is too large, it may not adhere to the eyeball properly or shift. Conversely, a smaller base curve may cause a feeling of tightness in the eyes. Therefore, although some brands have good product quality, some people may still find them uncomfortable to wear.

【Water Content】refers to the proportion of water in the lens. Lenses with higher water content are softer but are also prone to deformation and moisture loss. Generally, lenses with a water content higher than 50% are used to make daily disposable lenses, while lenses with lower water content are used to make bi-weekly or monthly disposable lenses. It is important to note that wearing lenses with higher water content for a long time may lead to dry eyes.

【Center Thickness】Less than 0.04mm is considered ultra-thin, 0.04-0.09mm is standard, and greater than 0.09mm is thick. Ultra-thin lenses have increased oxygen permeability, but are prone to dryness and dehydration. For colored contact lenses, making them ultra-thin is not realistic due to the sandwich process used, so a thickness of 0.04mm-0.065mm is considered ideal.

【Oxygen Permeability】is an important indicator of the quality of contact lens materials. To maintain oxygen supply, it is necessary to ensure that the lens has high oxygen permeability. Generally, the thinner the lens and the higher the water content, the higher the oxygen permeability.

Eye health is essential, so besides professional guidance from doctors, it is essential to purchase contact lenses from legitimate channels. EyeCoo has always adhered to the quality policy of "Quality First, Innovation, Improvement, Customer Supreme," forging ahead, striving for excellence, basing itself on quality in the market, winning the market with credibility, and providing customers with high-quality and safe products and consistent service.