The point I am making is that there are simple answers to your questions
The one re the GMC has been raised by you before
You are making an assumption that Gerry told this to the GMC
I have never heard the McCanns refer to the eye defect as a coloboma you will not have a cite for this
It is another instance of someone else using a word and then sceptics assuming Gerry used it
Assumptions assumptions assumptions
Ha ha, it was The Lancet actually, my mistake. It was the 'family' who told The Lancet, so how did they make that mistake? If it had been discussed they would surely have been reassured by her doctor parents that it was 'just a fleck of colour'. A coloboma is a specific condition requiring examination to discover which part of the eye is involved and ongoing monitoring to check eyesight and to make sure there's no other associated health problems.
Piers Morgan asked about it and Gerry waffled;
"G. MCCANN: Certainly believe it wouldn't have changed. I think there's been a pattern to be still there. That it's -- the technical term is coloboma, where there's a defect in the iris.
I don't think it is actually. I think it's actually an additional bit of color. She certainly had no visual problems."
If it was an additional bit of colour it can't be called a coloboma, 'technically' or otherwise. A coloboma is not a defect in the iris, it's a hole in one of the structures of the eye, such as the iris, retina, choroid, or optic disc. If Madeleine had one it would have been picked up in her infant checks and she would have been referred to an ophthalmologist. She either had one or she didn't and her parents would know.