Friday, 21 October 2011

No diplopia ....

Saw my GP yesterday who checked my eyes again (checked 3 weeks ago) and also tested my neurological function .... all clear. She thinks the episode of double vision was probably due to a temporary failure of my eye muscles to work in unison. If this should happen again she suggests that I cover each eye in turn to see if the 'double' image resolves with one eye covered.

"The 2 most common mechanisms for diplopia are ocular misalignment and ophthalmic aberrations (ie, defects of the cornea, lens, iris or retina). The most important clue to the identification of the mechanism is whether the patient has monocular or binocular diplopia. Ocular misalignment in a patient with normal binocular vision results in binocular diplopia, defined as diplopia that resolves when either eye is occluded. If the image of an object that is being viewed does not fall on the fovea of both retinas, then the image appears to be in 2 different spatial locations and diplopia occurs.

   Monocular diplopia is defined as double vision that is present in the affected eye while the other eye is occluded. In nearly all circumstances, monocular diplopia is the result of a local ocular aberration of the cornea, iris, lens or, rarely, the retina. Monocular diploplia is never caused by misalignment of the eyes."

So the explanation for my brief episode of double vision was nothing to do with Feckit after all ...... GREAT news!

Monday, 17 October 2011

Double trouble! ..... was it diplopia?

A very weird thing happened yesterday! I was reading in the lounge and looked up out of the window on my right to watch one of our cats, Oliver, stalking a very large Paradise duck. The duck soon flew off unharmed but to my amazement I found that I was looking at two distinct Olivers walking one behind the other!

Naturally enough I found this rather alarming so I looked away to check if I was 'seeing double' of every thing around me .... but I wasn't. I looked outside again and found that I was now looking at two Pru's (our other cat) who had followed Oliver across the lawn. This made me realise that this "double trouble" was definitely not a figment of my imagination! It only appeared to happen when I looked to the right without completely turning my head. However, all seemed to return to normal within a very short time (around 2 to 3 minutes) and I have not had any repetition as yet. 

Diplopia (double vision) is a distinct condition and should not be confused with "blurred" vision. It has many potential causes which may involve various different structures. Because one of the many causes could be interference in the pathway of one of the cranial nerves III, IV or VI it might be significant in view of Feckit's position in my brain. Even though it has only happened on this one occasiion I thought it prudent to inform my doctor just in case it should occur again.