Your optician will give you a timetable to increase gradually the length of time you wear your lenses, starting with a few hours each day. It can take up to a fortnight to reach maximum wearing time with gas permeable lenses, but is usually much quicker for soft lenses. Good hygiene and lens care are essential to keep your lenses and your eyes in good condition. Always follow the care regime your optician prescribes and attend regular aftercare visits.