Is the period of 7 months from the last change in the value of the lenses sufficient to make an appointment for an examination qualifying for a laser vision correction surgery?

During the preliminary qualifying examination, an ophthalmic surgeon usually verifies the last 12 months in terms of the stability of the vision defect as it is normally assumed that the defect is stable if the patient did not need to have the power of contact lenses or glasses increased for the last year.