Do I have sub-clinical keratoconus?

[realund]

I'm 35 years old and have worn glasses or contacts since I was 11.
I recently had a corneal topography done during pre-Lasik exam. There was some yellow in the right scan, indicating possible abnormality, despite "pristine" external corneas and d numbers.
Over the past 10 years (ages 25 to 35) my right eye went from a .5 to a 2.25 astigmatism, while my left eye went from 0 to .75. Between the yellow scan and the Rx history, I was told I have subclinical keratoconus.
My question is: is there any other explanation for this level of change in astigmatism over a 10-year period? For example, my work during the same time period has involved hours in front of computer screens every day, whereas before this was not the case.

[JohnHaganMD]

I would suggest you consult a different cornea surgeon for a second opinion

[JohnHaganMD]

Ideally the corneas should be measured with you not having worn your contacts for 7-10 days (longer if gas permeable) as contact lens can induce irregular corneal astigmatism.

I would suggest you consult a different cornea surgeon for a second opinion and don't wear your contacts for at least a week before the exam.

JCH MD

[realund]

Apologies, I wasn't clear.
I wore contacts from 11 to approximately 20, but had to stop due to allergies/dry eyes. Since then I've worn glasses exclusively.