Yes, but I wouldn't do it. The online stores will contact the resident that wrote it for you and ask her/him to validate the prescription. This would put your colleague in a compromised, potentially unethical position. What I would do instead is go to an online store and try to order the lens. You will need the complete RX (correction, size of the lens, base curve, any cylinder correction if you have a special lens for astigmatism). Enter the name/phone number/address of your current eye physician. They will call her/his office and I bet >90% chance they approve the prescription.