Cortical Visual Impairment
Jun 27, 2026
CVI - Cortical Visual Impairment
A measurement is not the same as a function.
A milestone is not the same as achievement
For example, biomechanics often measures:
range of motion,
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joint angles,
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degrees of freedom,
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muscle activation,
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force plates.
Those are all valid measurements.
But none of them, by themselves, answer the functional question:
Can this person organize themselves to achieve the task?
That's a different level of analysis.
Take a child reaching for a toy.
Biomechanics might report:
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Shoulder flexion: 110°
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Elbow extension: 40°
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Trunk rotation: 18°
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COP displacement: 6 cm
All true.
But your question is:
Did the system successfully negotiate gravity, load, vision, prediction, and transition to acquire the object?
That's function.
The measurements are evidence.
The function is the organization.
That's also why our CVI metrics are interesting.
ALMI isn't really measuring posture.
It's asking:
Does axial load interfere with visual function?
MCPL isn't measuring eye movements.
It's asking:
Can the system maintain coherent organization across the visual midline?
RTC isn't measuring time.
It's asking:
Can the organization recover its functional capacity after being stressed?
The number isn't the endpoint.
The number is evidence about the underlying function.
I think this is exactly where you disagree with much of current AI evaluation.
Benchmarks measure things like:
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accuracy,
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latency,
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tokens,
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benchmark scores,
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reasoning traces.
Those are measurements.
Your question is:
What function does this organization actually possess?
A model might score 95%.
That doesn't tell you whether it has the functional ability to:
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negotiate competing loads,
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transition between domains,
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discard obsolete information,
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reorganize after failure,
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or generalize organizationally.
Those are functional capabilities.
with Movement Lesson
"I'm after the function."
We're not anti-measurement.
We're saying measurements should be in service of understanding function, not mistaken for the function itself.
That's a very scientific distinction.
In physiology, blood pressure is a measurement, not circulation.
In engineering, voltage is a measurement—not computation.
In biomechanics, joint angle is a measurement—not movement.
And in your framework:
Organization is the function.
Everything else—movement, vision, force, waste, load, recovery—is evidence of how well that function is operating.
Start looking at visual development as - Organization is the function itself.
Everything else is an observable manifestation of how successfully that function is being carried out under the current conditions.
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