Generally myopia 100 degrees will remove the cornea with a thickness of 10. If you are 1000 degrees, the cornea with the thickness of 100 will be removed, then the remaining corneal thickness is very close to the minimum value of 4 10, which is still very risky.

The possibility of getting keratoconus is uncertain, because it is related to the use of eyes after surgery or after trauma and impact, and it is not a definite result.

If you recover well, there will be no problem. To prevent keratoconus, we should start from many aspects, not just eat foods that reduce intraocular pressure.

After the operation, the ability of eyes to resist external force will be slightly weaker than before, and normal eyes can't bear the blow of fists, let alone after the operation.

Finally, I wish you good health.