You can say the power was constant if you have checked every year! If you have not ..then we cannot say that
There is a significant increase in number ..so possible that there is some development.. diagnosed as Keratoconous
There is no way to increase the corneal thickness as fas as i know
Next Steps
May check up from another place also to confirm diagnosis ,,even slight change in pachy recording may be there in 2 places/ instruments
Health Tips
If it is progressive Keratoconous ..you will need C3R treatment ..better not to plan for such profession where all these are very important