Contact lenses are usually seen as unpractical, since you can’t usually take them out during the day, because you have to be able to put them in a special liquid, and also you will have to clean them with a special liquid. Also you will have to take them out of your eye during the night and put them in that liquid once again. Contacts prevent some of the oxygen from the air around your eye, from passing to your cornea, and that can cause corneal oxygen deficiency – this is the biggest cause for eye ache, and also the reason why you need to take the contacts off during the night.
Well there are specially designed continuous wear contact lenses that you can wear at all times without taking them off. The reason for this is that they have been made out of a specific compund that lets air pass to your eye almost as easily as it would if you weren’t wearing contacts. This invention has advanced contact lense technology and has brought contacts available for people who have trouble wearing them because they have sensitive eyes.
You can wear these types of contact lenses for a period of four weeks in a row, and after that you need to take them off. The reason for this is that these lenses allow the air pass almost as easily as if it would if you weren’t wearing anything. Basically you are going to change the lenses to new ones every four weeks, and during the exchanging process, you will take a few days brake and wear glasses during that time.
Normally you have to take contact lenses out every day, and even if there are breathable contacts – or rigid gas permeable contact (RGP) – they do not provide enough airflow through the lens. So contact your optician and find out which lenses you can get that you can wear all the time!