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Frequently Asked Questions


No. At this point, we only sell daily and monthly lenses. We are looking into selling other lens types such as bi-weeklies.

Eiyan lenses offer UVA/UVB class II protection. that means that they protect your eyes against 70% of UVA rays, and 95% of UVB rays. Eiyan lenses should be worn with adequate protective eyewear (sunglasses etc.) to provide full protection for your eyes.

Eiyan monthly lenses have a basecurve (BC) of 8.7 and a diameter of 14.0. Our daily lenses also have a base curve of 8.7, with a slightly larger diameter of 14.1.

Eiyan lenses are manufactured by our trusted manufacturing partner, Visco Vision. Visco is one of the largest manufacturers of silicone hydrogel lenses in the world, and they've been leading in the contact lense industry since 2009. The manufacturing plant is located in Taoyuan City, Taiwan.

No. We don't carry colored contact lenses.
However, our lenses do have a visibility tint - a very light blue tint. This slight tint is typical of good-quality lenses, and doesn't affect your vision or the color of your eye. It helps you locate your lens in your eye and in the lens solution.

Our lenses are made of a high-quality silicone hydrogel with 47% water content. The monthly lenses have a high oxygen permeability of 150 Dk/t, while the daily lenses offer an oxygen permeability of 120 Dk/t. Both types provide all-day comfort and moistness.

Yes! Eiyan lenses meet all safety regulations set by the FDA. They also meet safety and quality standards set by other regulatory systems such as GMP, ISO:14385-2016, QSR and MDSAP.

Unfortunately, at this time we don't offer toric lenses or multifocal lenses. We may offer these products sometime in the future.

Eiyan offers both monthly and daily lenses.

The monthly lenses can be confidently worn for 30 days; after that, they should be discarded. Wearing your lenses for too long can be harmful to your eyes.

The daily lenses should be disposed of immediately after you take them out. Never put daily lenses back into your eyes after removal.