Are prisms in glasses allowed?

[bamboo]

Just wondering if anyone can answer the above.

I have unequal refractive error, (one eye is -50, the other -3.50), which when corrected, can cause some difficulties to cope with for a length of time.

Use of a prism in the -3.50 lense stops this difficulty, without altering the refraction used.

I know prisms are normally used for strabismus, (squint), but I do not have this disorder, just the anisometropia, (unequal refractive error).

Is there anyone on the board, (AME, or otherwise), who knows if the CAA have any regulations regarding prism use?

[foghorn]

There is a limit on anisometropia of 2 dioptres for a JAA Class One and 3 dioptres for a JAA class two.

If your post does not contain a typo, it suggests you have anisometropia of 46.5 dioptres.

This will cause you problems.

Sorry to be the bringer of bad news. Make sure you phone the AMC at Gatwick to get the official line about it.
foggy