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What Is MoistureSeal Technology?

MoistureSeal Technology is Bausch + Lomb's material technology used in the samfilcon A silicone hydrogel found in monthly ULTRA lenses, including ULTRA Multifocal for Astigmatism. It uses a two-phase polymerization process that builds the silicone structure first and then incorporates polyvinylpyrrolidone, or PVP, throughout and around that structure. PVP is highly hydrophilic, so it attracts water and contributes to wettability across the lens. Bausch + Lomb associates the technology with moisture retention during a full wearing day. The daily disposable ULTRA One Day uses Advanced MoistureSeal Technology in kalifilcon A material.

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What Is MoistureSeal Technology?

MoistureSeal Technology is Bausch + Lomb's material technology used in the samfilcon A silicone hydrogel found in monthly ULTRA lenses, including ULTRA Multifocal for Astigmatism. It uses a two-phase polymerization process that builds the silicone structure first and then incorporates polyvinylpyrrolidone, or PVP, throughout and around that structure. PVP is highly hydrophilic, so it attracts water and contributes to wettability across the lens. Bausch + Lomb associates the technology with moisture retention during a full wearing day. The daily disposable ULTRA One Day uses Advanced MoistureSeal Technology in kalifilcon A material.

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Why Is MoistureSeal Technology Used in Contact Lenses?

MoistureSeal Technology is designed to balance oxygen transmission, flexibility, water retention, and surface wettability in a reusable silicone hydrogel lens. The samfilcon A material contains 46% water and incorporates PVP throughout the lens matrix rather than relying on a removable wetting layer. Bausch + Lomb reports that ULTRA lenses retain 95% of their moisture for 16 hours based on a laboratory study. Wearer comfort can still differ with tear film, fit, environment, care routine, and length of wear.

How Does MoistureSeal Technology Work?

The manufacturing process begins by forming a flexible silicone matrix from multiple silicone components. During a later polymerization phase, PVP is formed throughout and around that silicone network. This creates hydrophilic regions within the lens and at its surface that attract and hold water. The resulting samfilcon A material combines silicone-driven oxygen transmission with PVP-driven wettability and moisture retention.

Which Contact Lenses Use MoistureSeal Technology?

MoistureSeal Technology is used throughout the Bausch + Lomb ULTRA monthly contact lens family. The lineup includes ULTRA sphere lenses, ULTRA for Astigmatism, ULTRA for Presbyopia, and ULTRA Multifocal for Astigmatism. These versions share samfilcon A and the same material technology while using different optical designs for their correction type. Sphere and toric options use high-definition optics, while the multifocal designs use Bausch + Lomb's 3-Zone Progressive Design.

What Should Wearers Know About MoistureSeal Technology?

MoistureSeal Technology is part of the lens material and does not remove the need for proper reusable-lens care. ULTRA lenses must be cleaned, disinfected, stored, and replaced according to the prescribed schedule and product labeling. Some ULTRA lenses have approval for extended wear, but overnight contact lens wear carries greater risk of serious eye complications than daily wear. The wear schedule should come from the prescribing eye care professional rather than from the material technology alone.

Frequently Asked Questions About MoistureSeal Technology

What is PVP in MoistureSeal Technology?

PVP stands for polyvinylpyrrolidone, a hydrophilic polymer incorporated through and around the silicone structure to attract water and increase lens wettability.

Which material uses MoistureSeal Technology?

Bausch + Lomb ULTRA lenses use samfilcon A, a silicone hydrogel material with MoistureSeal Technology.

Which ULTRA lenses use MoistureSeal Technology?

It is used in ULTRA sphere, ULTRA for Astigmatism, ULTRA for Presbyopia, and ULTRA Multifocal for Astigmatism lenses.

Is MoistureSeal Technology a surface treatment?

No. MoistureSeal Technology is built into the lens material. PVP is incorporated throughout and around the samfilcon A silicone matrix during the lens manufacturing process.

References

Bausch + Lomb ULTRA? Monthly. Bausch + Lomb. https://ecp.bauschcontactlenses.com/products/ultra-monthly/. Date Accessed October 21, 2026.

Bausch + Lomb ULTRA? for Astigmatism. Bausch + Lomb. https://ecp.bauschcontactlenses.com/products/ultra-monthly/astigmatism/. Date Accessed October 21, 2026.

ULTRA? for Presbyopia Monthly. Bausch + Lomb. https://ecp.bauschcontactlenses.com/products/ultra-monthly/presbyopia/. Date Accessed October 21, 2026.

Bausch + Lomb ULTRA? Multifocal for Astigmatism. Bausch + Lomb. https://ecp.bauschcontactlenses.com/products/ultra-monthly/multifocal-for-astigmatism/. Date Accessed October 21, 2026.

Contact Lens Risks. U.S. Food and Drug Administration. https://www.fda.gov/medical-devices/contact-lenses/contact-lens-risks. Date Accessed October 21, 2026.