The OFA does not require any preventative maintenance aside from periodic cleaning of the face rest, trial lens holders, glass camera cover, operator screen, and exterior shell.
Instructions can also be found within the Cleaning and Maintenance sections of the instructions for use (IFU):
Konan Medical USA
Customer Service and Technical Support:
Available 6:30 AM–5:00 PM Mon-Fri Pacific Time
Phone: +1 (949) 576 – 2255