Contact lenses - see the world with crisp edges. 

Contact lenses are a popular means of correcting eye impediments for those that do not wish to wear glasses. Most people are able to wear contacts, although there are the rare few that are sensitive to the material. Therefore, it is very important for all of those who are planning to wear contact lenses to consult with their ophthalmologist or optometrist first. 

Contact lenses can be made from a great assortment of plastics. However, these plastics fall into two major categories. They are either soft or rigid gas permeable. Soft contacts are typically 25-80% water in composition, and are hence quite comfortable and adaptable to the eyes. 

Contact lenses that are rigid gas permeable are not quite as adaptable but they are a lot more durable than the soft lenses. They are also more resistant to build-up of debris. They also tend to provide crisper vision than a soft lens. A soft lens tends to last a couple of weeks, while a rigid lens can be worn for several years. 

Some contact lenses conveniently come with UV blockers, but users must be wary that these are not a replacement for sunglasses. 

Improve your eyesight with contact lenses.