Contact lenses are a popular alternative to eyeglasses for vision correction, offering more natural vision, a wider field of view, and better aesthetics. They come in different types based on the duration of use and the material made from. In this article, we will sort them according to these two categories.

Duration of use:

1. Daily disposable contact lenses

As the name suggests, these lenses are meant to be worn once and discarded. They are ideal for those who don't want to bother with cleaning and storing lenses. Daily disposable lenses are made from soft, flexible materials that conform to the shape of the eye and provide all-day comfort.

2. Bi-weekly disposable contact lenses

These lenses are designed to be worn for one or two weeks before they need to be replaced. They require less maintenance than monthly lenses but still require cleaning and storing in a proper solution when not in use.

3. Monthly disposable contact lenses

Monthly disposable contact lenses are the most common type of contact lens. They can be worn for up to 30 days before they need to be replaced. Monthly lenses require regular cleaning and storing in a solution to maintain their shape and cleanliness.

4. Extended-wear contact lenses

Extended-wear contact lenses are designed to be worn for up to 29 days without removal. They are typically made from silicone hydrogel, a highly breathable material that allows oxygen to reach the cornea. Extended-wear lenses require careful cleaning and disinfection to prevent infection.

Material made from:

• Hydrogel contact lenses

Soft contact lenses are made from a flexible, water-absorbing material called hydrogel. They are comfortable to wear and are available in different types, including daily disposables, bi-weekly disposables, and monthly disposables.

• Silicon hydrogel contact lenses

Silicon hydrogel contact lenses are a popular choice for their excellent oxygen permeability and comfort. They are made from a soft, flexible material that allows more oxygen to reach the cornea than traditional hydrogel lenses. Silicon hydrogel lenses are available in different types, including daily disposables, weekly or bi-weekly disposables, and monthly disposables. They are also available in toric and multifocal designs for those with astigmatism or presbyopia. They are a great option for those looking for comfort, convenience, and clear vision.

In conclusion, contact lenses come in different types based on the duration of use and the material made from. It is important to choose the right type of contact lens that suits your needs and lifestyle. It is also important to follow proper hygiene and care guidelines to prevent eye infections and ensure the longevity of the lenses. If you are considering contact lenses, consult with your eye care professional to determine the best type for you.