To help can you answer these:
1. Clarify the precise reason for rejection; was it absolute level of astigmatism, fluctuation in astigmatism or some other reason.
2. Can you post the results of your Optometrist visits ie the result for SPH, CYL and AXIS each time
3. What prompted you to go to the Optometrist in the first place?
4. Why have you had more than one Optometrist test?
5. Do you have a link to visual requirements for the RAF?
6. Have you had a RAF medical? If so can you remember what eye tests were carried out?