What is the difference between hard and soft contact lenses?
Rigid gas permeable (RGP) lenses, sometimes referred to as hard lenses, are made of slightly flexible plastics that allow oxygen to pass through them to the corneas of eyes. There are materials that should only be worn during the day and materials that can be worn throughout the night. RGPs give you excellent vision and have a short adaptation period. They are durable, come in light tints for handling and usually have a relatively long life. Soft contact lenses are made of soft, flexible plastic that also allows oxygen to pass through it to the corneas of the eyes. There are soft lenses that are only to be worn during the waking hours and soft lenses designed for overnight wear. Usually these lenses are immediately comfortable and have a very short adaptation period. These lenses come in light tints, or tints that change the color of your eyes, and they also can be made bifocal. There are soft lenses which can be kept for about a year, ones that you replace every 3 or 4 months, monthly
