Multifocal contact lenses have taken the medical world by storm as they have introduced new standards of eye care. However this doesn’t mean that you immediately ditch your monofocal contact lens or glasses and order yourself a multifocal. Like all medical devices you need to be aware of the technology and the principles behind the use of multifocal contact lens use.
Options in multifocal lenses
Multifocal lenses make the patient view both distance powers and near powers simultaneously. Unlike monofocal technology it does not train one eye to look at near objects and one eye to focus on faraway ones. There are two basic options in multifocal lens i.e. aspheric and concentric.
Aspheric multifocal lenses are progressive lenses. They have lots of different powers blended all throughout the lens. The center of the contact lens can be designated either to distance power or to near power. The presence or absence of astigmatism in your eyes will determine your suitability for aspheric lenses.
Concentric contact lenses have a central core of near/far power and alternative concentric rings of opposite powers. In case of multiple rings there is alternate presence of myopic and hypermetropic powers.
Astigmatism and multifocal contact lenses
Multifocal contact lenses have a cylinder of 1.00 D but this does not suit most astigmatic patents. If you have presbyopia plus astigmatism then you could use a torric mono vision contact lens on one eye and a multifocal lens of the non dominant eye. You can also consider buying Multi-focal contacts with torric corrections.
References: Eyes- Laser Eye Surgeries