> They did experiments by repairing cornea that way:

As a person w/ keratoconus I have read a fair bit about this treatment, corneal collagen crosslinking with riboflavin (C3R).

It does not repair the damage caused by keratoconus. It stabilizes the cornea and slows or halts progression. The collagen in the cornea naturally crosslinks (likely due to UV exposure) over our lives. My our late 30s our corneas are stable. For someone with keratoconus, where the cornea becomes progressively misshapen, stabilizing the tissue with UV (enhanced by riboflavin) slows or prevents further damage.

I was just a few years too early in my diagnosis to benefit from C3R. My eyes have been stable for the last 10 - 12 years. I wish I could have had C3R when my condition was first diagnosed back in my 20s.

Yes, i see what you're saying. I'm just a layman here, so i talking only based on my recollection of what i read somewhere somewhen. I think i also read another study where there were scratches or some other damage and they did it similar to pothole filling by applying solution/mix of collagen with vitamin B and curing with UV.