Application Process for Medical Certification

Exam Techniques and Criteria for Qualification: Items 31–34. Eye - Orthokeratology

Orthokeratology (Ortho-K) is the use of rigid gas-permeable contact lenses, normally worn only during sleep, to improve vision through reshaping of the cornea. It is used as an alternative to eyeglasses, refractive surgery, or for those who prefer not to wear contact lenses while awake. The correction is not permanent and visual acuity can regress while not wearing the Ortho-K lenses. There is no reasonable or reliable way to determine standards for the entire period the lenses are removed.

Therefore, to be found qualified, applicants who use Ortho-K lenses must meet the applicable vision standard while wearing the Ortho-K lenses AND must wear the Ortho-K lenses while piloting aircraft. The limitation must use Ortho-K lenses while performing pilot duties must be placed on the medical certificate.