Originally Posted by
AC99
I recall that when I was a prone shooter a few decades ago a fellow shooter had similar problem. He was right handed but he had lost almost all vision in his right eye.
He overcame this problem by fitting, what appeared to be a miniature periscope, just a few inches long with the eyepiece protruding to the left of the rear sight assembly such that he was able to shoot right-handed as normal but sighted with his left eye and with a high degree of success if I remember correctly.
I think they were described as off-set attachments and may have been made and marketed by Parker Hale at the time but not sure if anything similar is still available since I no longer shoot prone.