The CLSO and CMLSO exams are primarily based upon the ANSI Z136 Series of Laser Safety Standards. The parent document, ANSI
Z136.1-2007 Safe Use of Lasers is the primary source of information for the CLSO exam and a major source of information for the CMLSO exam. The primary source of information for the CMLSO exam
is the ANSI Z136.3-2005 Safe Use of Lasers in Health Care Facilities standard.
Laser Institute of America is the publisher of the ANSI standards; these standards can be purchased from the LIA bookstore.
All accepted applicants must submit the examination fee at least two weeks prior to the examination.
Any applicant who has not paid will not be permitted to sit for the examination.
If the applicant is unable to take the scheduled examination, he/she may request to reschedule the
examination. Applicants who request to reschedule an examination more than 30 days prior to the examination date may apply the examination fee to a future exam within the 2-year period of acceptance,
without incurring the rescheduling fee. Requests to reschedule an examination less than 30 days notice prior to an examination date are subject to a rescheduling fee of $50.00. In some circumstances,
this rescheduling fee may be waived. For consideration, petitions must be made in writing to the BLS and will be reviewed on a case-by-case basis.
Applicants who send notification of cancellation in writing to the BLS more than 30 days prior to the examination may request a refund of the examination fee.
The exam is made up of 100 multiple-choice questions. The questions are grouped into areas of practice. Each question has five (four for CMLSO exam) possible answers from which to choose. The total allotted time to take the exam is three hours.
Examinees may bring a simple scientific calculator (non-programmable) and spare batteries if desired. (Calculators are not necessary for the CMLSO exam). Personal computers, books, manuals, notes or other reference materials may not be brought into the exam room.
Materials will be inspected on site, and proctors can refuse to allow examinees to bring certain calculators or other materials into the examination room. If you have any questions about what types of calculators or other materials are permitted, please contact the BLS in advance.
All applications for the CLSO and CMLSO exams must be postmarked no later than two weeks prior to when you wish to take the exam.