Light and dark periods

[JohnLund]

I am nearly blind as a result of glaucoma.  In recent years I have had periods when everything is dark and periods when everything is light.   Frequently  dark and light days occur one after the other but they may occur in different parts of the day.  I have asked 6 specialists about this problem but never had an explanation.  The main suggestion is that it is a matter of blood circulation but from my experience and my own tests I do not believe this explanation.  I put my problem to the International Glaucoma Association and said that I found it hard to believe that my situation is unique.  They said that they  did not know of anyone else like me. Can you help me?

[John C Hagan III, MD, FACS, FAAO]

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[JohnLund]

Dear Dr John C, Hagan
Thank you for your interesting  information.  I should point out that my acuity is unaffected by the darkness or lightness, so basically my sight is unaltered.  I am very familiar with the Charles Bonnet Syndrome since I suffer- or rather should say, enjoy it.  It only affects my left eye which is totally blind.  John Lund

[John C Hagan III, MD, FACS, FAAO]

Given your are almost blind I would suggest that some days your brain pays more attention to your eyes which would be your dark days and other days more attention to your visual cortex in your brain which can generate images and light like phantom pain is generated after a leg is cut off.

There is a disease called Charles Bonet syndrome in which totally blind people can see just like watching a movie. It all comes from the brain machinery running.

JCH III MD