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I'm sorry to hear about your difficult situation.
What is the reason for his current condition?
Sorry, lung cancer
His current status? Awake and breathing on his own? On a ventilator?
Awake and breathing on his own.
What is exactly blue? the whites of his eyes?
When did it turn this way?
No, the pupil area
And the color seemed to turn within the last 10 days.
is he on supplemental oxygen?
Not at this time...
it could be that his oxygenation may be low.
The change in eye color may also be due changes in blood flow.