Most soft contact lenses are massed produced in only a few sizes.  Therefore it makes little difference where they are purchased.  The soft contact you buy on line is the exact same lens you buy from your doctor.  But be certain you get what the doctor ordered.  Never allow a mail order house to substitute product.  This is illegal and dangerous.  It is also illegal to sell lenses beyond the expiration date of a prescription. Only the doctor has the authority to extend a prescription. An expired prescription means it is time to have the eyes evaluated for possible complications to contact lens wear.

In the case of firm oxygen permeable lenses, it is better to get your lenses through the doctor.  Firm contact lenses are custom made and some of the finishing work is done by hand.  Kirkland Vision Center orders it's firm lenses from a reliable lab.  Prior to dispensing, the lenses are inspected for defects in workmanship.  Never order firm contacts from a mail order house or a discount optical.