In general all contact lenses, whether soft of rigid type, will require a cleaning, disinfecting and rinsing solution. Cleaning removes surface debris and bacteria that may adhere to the contact lenses. It is avascular otherwise it wouldn't transmit light without distortion. As a result of this living tissue being avascular it is necessary to obtain oxygen from the atmosphere. The wearing of a contact lens interrupts the flow of oxygen to the cornea and due to changes in the metabolic pump of the corneal cells the tissue thickens, called oedema.
Short answer is no.
Sometimes a contact lens, especially a soft contact lens may roll up and become difficult to find. An eyecare practitioner will be able to locate the lens and remove it. Cover the other eye to determine if vision is still clear from the eye where you suspect that you've lost the lens. If vision is blurred then more than likely the lens is either dislodged from the cornea or has fallen from the eye. Check the vision of each eye by covering alternate eyes with your hand.