What are the advantages of disposable contact lenses?

Whether they are better or not is a question that is still being discussed in the Medical community. However, the advantages of the disposable is that they are permeable, which allows movement of moisture and air through them, making them easier to wear. They also adhere more closely to the eyeball, making them much less likely to fall out. Hard contacts are less likely to spread disease and force the eyeball to stay in proper shape, an important aspect for some eye diseases and conditions. Generally speaking they are more permeable to air, so your eyes get more oxygen. GENERALLY SPEAKING THEY don't make "hard" contact lenses anymore. The difference between regular and disposable contacts is strictly CONVIENIENCE. Both types are very "breathable", allowing oxygen to reach the eye. However, permenant contacts need constant upkeep. You need to steralize them in special containers which need electricity and special solutions in which to steralize them. With disposable lenses, you don't need all that inconvienience. You wear them and toss them out. With modern advances, they are able to make disposable lenses on par, cost wise, with permenant lenses. I have no doubt that soon, all lenses will be disposable. <<>> In Addition: Contact lenses come in different materials and different designs. Silicone hydrogel lenses are the most common non-daily lenses, usually allowing more oxygen flow to the cornea. Very soon there will be daily-wear silicone hydrogel lenses available such as 1-Day Acuvue TruEye from Johnson & Johnson. Other manufacturers will follow.