Some states do not require opticians to be licensed or certified in order to seek employment with the public.
You are expected to receive professional training to be eligible for a job as an optician.
In fact, 21 states do require optician certification, which is different from licensing.
Certification is obtained by passing a state or national certification examination or test.
A license is received after applying for and paying any applicable fees for the license to work as an optician in a certain city or state.
That means 28 states do not require you to have a license or certificate.
The National Opticianry Competency Examination (NOCE) and the Contact Lens Registry Examination (CLRE) are two of the most common basic certification exams for an optician in any state in the US.