Table 2.
Characteristics of lenses used in this study.
| Brand Name | Magic Eye | Acuvue 2 |
|---|---|---|
| Manufacture | Menicon | Johnson & Johnson Vision Care |
| Materials | 58% HEMA/GMA | Hydrogel ionic (negative charge) HEMA/MA |
| USAN | Hioxifilcon A | Etafilcon A |
| Water content | 42% | 58% |
| FDA Classification | Group II | Group IV |
| Diameter | 14.2 mm | 14.0 mm |
| Center thickness | 0.10 mm (−3.00 D) 0.08 mm | 0.085 mm (−3.00 D) 0.084 mm |
| Base curve | 8.6 mm | 8.3 mm, 8.7 mm |
| Package | Flat pack | Blister pack |
USAN (United States Adopted Name).
HEMA (poly-2-hydroxyethyl methacrylate).
MA (methacrylic acid).
GMA (glycerol methacrylate).
Hioxifilcon (A and D) is a copolymer of HEMA/GMA. It contains hydroxyl groups that tightly bind water and so it does not dehydrate as much as traditional HEMA materials do..
Etafilcon is a copolymer of HEMA/MA. It high water content ionic lens polymer..