Prism correction for horizontal diplopia at a distance

[Ciamhnait]

I've had worsening diplopia for close to a decade--first at night (when I was tired), but now pretty much 24/7 (I'm almost 50).

I was prescribed glasses with a good deal of prism (sorry, don't have the script handy), and these didn't work at all. However, the prism testing "monocle" the doctor used resolved the diplopia immediate and profoundly.

I'm not sure how the testing "monocle" translates into a glasses prescription, so I'm not sure why the monocle would work, but the glasses wouldn't, other than the lab made the lenses wrong. Any thoughts? (I asked the doctor if I could buy his prism testing monocle, and just walk around with that for the rest of my life, since it worked so well...)

[CBCT]

You may want to explore Shaw Lens
http://shawlens.com

[JohnHaganMD]

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[JohnHaganMD]

The "monocle" is almost certainly a prism which moves images one way or another (towards the apex).  There is a limit to how much prism can be put into regular glasses. However large amounts can be put into "press on Fresnel prisms"  These are noticeable on the glasses in some cases but certainly would not be as strange looking as using a "monocle".   Ask your doctor about Fresnel press on prisms" or consider seeing a Eye MD ophthalmologist that specializes in eye muscle problems (strabismus)