Physicians use "gross" or "grossly" as descriptors meaning "absolutely", "positively", "majorly" "big time" plus whatever word follows.
So "grossly normal" means "the macula is absolutely, positively, majorly, big time" NORMAL.
The macula is part of the back of the retina, where the occular nerve enters. The macula and retina are part of the eye.
Redness of the scleras (the whites of the eye) occur usually from irritation but not from anything abnormal with eye structures.
pancreas grossly normal
Grossly unremarkable means there is nothing interesting to talk about, its normal.
"Grossly unremarkable gallbladder" means that upon visual inspection during a medical procedure such as an ultrasound or surgery, the gallbladder appears normal with no obvious signs of disease or abnormalities.
On a chest x-ray, this means that the bones are seen as normal, without pathology.
Grossly tender means it obviously hurts when touched.
A spot, a stain, a blemish.
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Grossly benign means that to the naked eye, it does not appear dangerous.
Your eyes, when looking straight forward, can normally see an area comparable to a half-circle from left to right. The areas left and right of your direct line of vision in front of you are the areas of your 'peripheral vision'. If these are 'grossly intact' it's good news, 'grossly' meaning 'roughly speaking'.
This note is good news; it means the physical examination of the function of your cranial nerves was normal.
I think you read the result incorrectly. "Grossly remarkable" doesn't make sense. "Grossly unremarkable" means there was no obvious abnormality.
Without a blemish, spotless. In modern English "immaculate".