Advance Kerotoconus Problem in left eye.

Hi, I am a 28-year-old man and in 2008 I was diagnosed with keratoconus and advised to go LVPEI for treatment.Since 2008 i have been wearing Hard contact lenses.In 2012 i went and did C3R in my right eye but left eye was in advance stage so the procedure could not be done.Hence i continued with piggy back contact lenses in my left eye and RoseK lenses in my right eye. Till now i didnt face any issues with my vision.Binocularly my vision was 100% but since few days i am feeling discomfort in my left eye.I have a feeling of vision imbalance between my left and right eye which was not there all yrr these year. I have a feeling that if i go this time for  checkup the only option they would tell is cornea transplant.I am a software engineer and work 9-10hours a day in front of computer and phone.I am scared whether if the transplant is done how successful will it be.Will i be able to see,will my vision improve and most importantly what about my job.How soon will i be able to go back to work