Table 1.
Details of hydrogel and silicone hydrogel polymers with their ionicity, water content, and Dk value (for soft contact lenses)
| Material | Water content (%) | Dk | Lens variety | Brand name | |
|---|---|---|---|---|---|
|
| |||||
| Hydrogel polymers | |||||
| A | Low water content (<50%) | ||||
| a. Non – ionic | |||||
| Helfilcon A and B | 45 | 12 | Continental Toric* Flexlens* | ||
| Hioxifilcon B | 49 | 15 | Alden* Flexlens* | ||
| Polymacon | 38 | 9 | Soflens 38 Soflens multifocal | Bausch + Lomb | |
| b. Ionic | |||||
| Balafilcon A | 36 | 112 | Purevision | Bausch + Lomb | |
| Deltafilcon A | 43 | 10 | Metrosoft | Bausch + Lomb | |
| B | High water content (>50%) | ||||
| a. Non – ionic | |||||
| Alphafilcon A | 66 | 32 | Soflenstoric | Bausch + Lomb | |
| Hilafilcon B | 59 | 22 | Softlens Daily Disposable Softlens Daily Disposable for astigmatism | Bausch + Lomb Bausch + Lomb | |
| Hioxifilcon A | 59 | 28 | Alden* Extreme* Eyeris* | ||
| Hioxifilcon D | 54 | 21 | Alden* Astera* Extreme* | ||
| Nelfilcon A | 69 | 26 | Dailies AquaComfort Plus Dailies colors Focus Dailies | Alcon | |
| Nesofilcon A | 78 | 42 | BiotrueOneday | Bausch + Lomb | |
| Omafilcon A | 60 | 33 | Proclear 1-Day Misight 1-day | CooperVisionCooperVision | |
| Omafilcon B | 62 | 34 | Proclear Multifocal and Multifocal toric Proclear sphere ProclearToric | CooperVision | |
| b. Ionic | |||||
| Etafilcon A | 58 | 28 | 1-Day Acuvue moist 1-Day Acuvue moist for astigmatism 1-Day Acuvue moist multifocal Acuvue 2 | Johnson & Johnson | |
| Methafilcon A | 55 | 18 | Kontur* | Kontur | |
| Ocufilcon B | 52 | 16 | Continental* | ||
| Ocufilcon D | 55 | 19.7 | Biomedics* | CooperVision | |
| Phemfilcon A | 55 | 16 | Freshlook Colorblends Freshlook colors, Dimensions | Aqualens | |
|
| |||||
| Silicone hydrogel polymers | |||||
|
| |||||
| Comfilcon A | 48 | 128 | Biofinity and all its variants | Coopervision | |
| Delefilcon A | 140 | Dailies Total1 Dailies Total1 Multifocal Dailies Total1 for Astigmatism | Alcon | ||
| Efrofilcon A | 74 | 60 | Kerasoft Thin Rose K2 Soft | Ultravision Menicon | |
| Fanfilcon A | 55 | 90 | Avaira Vitality Avaira Vitality Toric | Coopervision | |
| Lotrafilcon A | 24 | 140 | Air optix Night & Day Aqua | Alcon | |
| Lotrafilcon B | 33 | 110 | Air optix Aqua Air optix Aqua Multifocal Air optix for Astigmatism Air optix Plus HydraGlyde | Alcon | |
| Kalifilcon A | 55 | 107 | Infuse | Bausch + Lomb | |
| Narafilcon A | 46 | 100 | 1-Day AcuvueTruEye | Johnson & Johnson | |
| Olifilcon A | 47 | 175 | Biocurve Spherical Silicone | ||
| Samfilcon A | 46 | 114 | Ultra | Bausch + Lomb | |
| Senofilcon A | 38 | 103 | AcuvueOasys | Johnson & Johnson | |
| Senofilcon C | 41 | 103 | Acuvue Vita | Johnson & Johnson | |
| Somofilcon A | 56 | 60 | Clariti | Coopervision | |
| Stenfilcon A | 54 | 80 | MyDay | Coopervision | |
| Verofilcon | 51 | 90 | Precision | Alcon | |
*These lenses are not commonly available in India