Bifocal 2
A guide to crisp vision and healthy eyes with gp contact lenses, from the contact lens manufacturers association.
http://www.contactlenses.org/multifocals.htm
Implanteerbare contactlenzen
Implanteerbare contactlenzen
http://www.artisanlens.com/
Monolenses
How bifocals work, rgp vs. soft, advantages of different designs, monovision, multifocals, and more.
http://www.allaboutvision.com/contacts/bifocals.htm
RGP Lenses
Rgp contact lens care: a guide to caring for rgp or gp contact lenses, oxygen permeable contacts, contacts for astigmatism, bifocal contact lenses and more.
http://www.allaboutvision.com/contacts/carergplens.htm
Soft Lenses
Soft contact lens care: a guide to caring for soft contact lenses, disinfecting solutions, enzymatic cleaners, protein deposits, lipids, frequent replacement,and more.
http://www.allaboutvision.com/contacts/caresoftlens.htm