Is being blind in one eye and poor sight the other a disability ?

I would say so.: Disability is defined by the beholder. As far as you are concerned this is a real problem. Your insurer or employer may think differently.

Yes, low-vision: Total blindness in one eye and partial eyesight in the other is considered a disability, though it may not qualify for "legal blindness" if the better-seeing eye is 20/100 or better with correction. A full visual field test may help, since a constricted visual field plus reduced visual acuity may qualify for legal blindness disability benefits. Visit a low-vision rehabilitation specialist.