Curious..do/can you wear corrective lenses? What other functions..reading, watching TV and so forth gives you trouble..and what can you do well as to vision. What was the outset of your Keratoconus..how did you first become aware of it?
May be some work around that some of us visually challenged folks could offer. May sound silly but Google might be your friend..surely you're not alone.
My vision disability is OLD AGE...I had shooting glasses made specifically for pistol irons, rifle irons and scoped rifles.
Keep after a solution..should be something out there.