Right eye keratoconus. Me with this?

Hi doctor, I am a 26 year old female and I have been detected eith keratoconus in my right eye. I will be going through C3R tomorrow. For my left eye, my spherical number was constant since 2021 till march 2023 , it was -2.00 but within 1 month , my left eye spherical  power has suddenly increased from -2 to -2.75. but cylinder power is constant. What can be the cause for sudden increase in spherical power in just 1 month? Can this sudden increase be because of increase load on left eye as right eye has keratoconus. Also, I was detected keratoconus in right eye in Feb and then I went through pentacam again after 3 months that ie may 1st week 2023. There is slight progression in my right eye but left eye seems to be stable as per pentacam. But left eye spherical power has suddenly increased. Idk why. Can you please help me with this?