Multifocal contact lenses are a type of contact lens that is designed to help people with presbyopia, a condition that affects the ability to focus on close objects due to age-related changes in the eye. Multifocal contact lenses contain multiple prescriptions in one lens, allowing wearers to see clearly at different distances.
There are two main types of multifocal contact lenses: simultaneous vision lenses and alternating vision lenses. Simultaneous vision lenses have multiple prescriptions in one lens and work by allowing wearers to see both near and far distances at the same time. Alternating vision lenses work by providing different prescriptions in different zones of the lens, with one zone dedicated to distance vision and the other to near vision. These lenses require wearers to move their eyes in order to switch between zones and focus on the correct distance.
Multifocal contact lenses can be made from a variety of materials, including soft and rigid gas permeable materials. Some multifocal contact lenses are disposable and are worn for a short period of time, while others can be worn for longer periods of time.
It's important to note that not everyone is a good candidate for multifocal contact lenses, and they may not be suitable for those with certain eye conditions or those who require a high level of visual correction. It's important to consult with an eye doctor to determine whether multifocal contact lenses are right for you.