What is fusional strength

Hey guys

Any advice on this matter would be greatly appreciated.
I’m very close to obtaining my ppl, initially I wanted to fly for recreation only but have since considered doing a commercial licence. I’ve been told by my instructor that I have the ability to take this further and I will complete my ppl with less hours than all his other students. So here comes the snag!
As a child I had squint in my right eye that my parents had repaired at a very young age. The squint is not evident and I do not suffer from any kind of problem with it. In October I had a ophthalmologist have a look at it. She told me that the surgeon did a superb job and could not see how it would be a problem. When this kind of operation is done at a very young age the brain adapts and compensates.
My squint only becomes obvious when my good eye is covered. I obtained a commercial medical but just and I worry about maintaining it.

This is my eye report:

Mr X was seen at my practise on 9 October 2009.

His uncorrected visual acuity was 6/6 in either eye. His colour vision as per Ischara chart was 14/14 in both eyes.

On looking at the anterior segment the corneas were both clear and there was no cataract present.

The posterior segment was normal with healthy retina and optic nerves.

Oculomotility test found a small 10 prism diopter esophoria which he controls well with both eyes open.

The South African CAA Requirements are:

Any manifest squint or large errors of eye muscle balance (phoria).
The acceptable limits for ocular muscle balance 12 prism dioptres for exophoria, 6 dioptres for esophoria; and 1.5 dioptre for hyperphoria measured at distance.
The magnitude of the heterophoria in itself is not conclusive because the fusional strength varies between individuals 3.22(f) are only for guidance as to when fusional strengths reserves should be assessed, the applicant should be referred to a ophthalmologist acceptable to the AMS.

So do I stand a chance?

Regards

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

You are borderline. the information you were given is not correct. In children born with squint although surgery can often cosmetically make the eyes much straighter depth perception that is normal is RARELY if ever established.

As tested by an ophthalmologist your depth perception will be ablnormal since to have good depth perception eyes have to be perfectly straight and work together at the same time.

You are border line.  You should see as they indicate a ophthalmologist acceptable to the AMS.

JCH MD