Is there a limit on how much anisometropia (difference in prescriptions) one can have in order to pass the FAA class one medical exam?



Albert Einstein described INSANITY as asking the same question over and over again while expecting different results. Maybe you should take his advice.

Zaphod Beeblebrox

I already gave you the answer yesterday as to what is in the medical examiner's guide. Apparently it went right over yours head. Since you are correctable to 20/20, which you didn't mention in your original question, I'll repeat the pertinent segment with added emphasis: "When the visual acuity of one eye is decreased without presence of organic eye disease, usually due to strabismus or anisometropia, the visual acuity loss is simply recorded on FAA Form 8500-8, and CLASS I VISION STANDARDS ARE APPLIED AS USUAL. That means there is no limit if you can pass the vision test while wearing corrective lenses. If you cannot pass with your glasses (or contacts) off, then you will receive a limitation stating that you must always fly while wearing corrective lenses. If your weak eye exceeds 20/200 uncorrected, then a waiver will be issued. Now, just because you might hold a Class I medical certificate doesn't mean that all companies would hire you. Many airlines, for example, have stricter standards for new-hires than those applied by the FAA for obtaining a class I medical certificate. They also tend not to hire people who are worriers and suffer from psychological disorders such as hypochondria, which seems to be a problem indicated by some of your past questions.


Thanks for adding a new word to my vocabulary