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Eye Health

Contact Lens Materials & Water Content

Contact Lenses are commonly grouped into four groups based on water content (less than 50% water are considered to be low water content lenses, and greater than 50% water are high-water content) and on whether the lens surface is considered to be ionic (reactive) or non-ionic (less reactive).

Group 1 Contact Lenses (Low water content, non-ionic)
  • Tefilcon (38% water) – Cibasoft, Illusions, Torisoft
  • Tetrafilcon A (43% water) – CooperToric, Preference, Preference Toric, Vantage
  • Crofilcon (38% water) – CSI, CSI Toric
  • Ploymacon (38% water) – Biomedics 38, Edge III, Z4/Z6, Soflens 38
  • Lotrafilcon A (24%) – Focus Night & Day
  • Lotrafilcon B (38%) – O2Optix
  • Galyfilcon A (47%) – Acuvue Advance with Hydraclear, Advance for Astigmatism
  • Senofilcon A (38%) – Acuvue Oasys
Group 2 Contact Lenses (High water content, non-ionic)
  • Alfafilcon A (66%) – Soflens 66
  • Omafilcon A (62%) – Proclear Compatibles
  • Nelfilcon A (69%) – Focus Dailies, Dailies Toric
  • Hilafilcon A (70%) – Soflens 1-day
  • Hilafilcon B (59%) – Soflens 59
Group 3 Contact Lenses (Low Water content, ionic)
  • Phemfilcon A (38%) – Durasoft 2
  • Balafilcon A (36%) – Purevision
Group 4 Contact Lenses (High Water, Ionic)
  • Etafilcon A (58%) – Acuvue, Acuvue Bifocal, Acuvue 2, Acuvue 1-day
  • Ocufilcon D (55%) – Biomedics 55, Biomedics 55 Premier
  • Phemfilcon A (55%) – Durasoft 3, Freshlook, Wildeyes
  • Methafilcon A (55%) – Sunsoft Eclipse, Revolution, Sunsoft Toric
  • Vilfilcon A (55%) – Focus 1-2 Week, Focus Toric, Focus Progressives

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Shopzilla Gold Merchant If you are having any unexplained eye discomfort, watering, vision change or redness, remove your lenses immediately and consult your eye care professional before wearing your lenses again.
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