Question:medium
Which of these is NOT useful in arriving at a diagnosis of moderate papilledema in a patient of head injury?
Which of these is NOT useful in arriving at a diagnosis of moderate papilledema in a patient of head injury?
Show Hint
Papilledema is a fundus finding, pupillary reflex usually stays normal until very late disease.
Updated On: Jul 8, 2026
- Impaired pupillary reflex
- Hyperemia
- Filling of the physiological cup
- Blurring of the margins
Show Solution
The Correct Option is A
Solution and Explanation
Step 1: Split the four options into two groups.
Hyperemia, filling of the cup, and blurring of the margins are all things a doctor sees directly on the retina through an ophthalmoscope. Impaired pupillary reflex is a functional test of the nerve pathway, not a fundus appearance.
Step 2: Walk through disc swelling in order.
As pressure rises inside the skull and reaches the optic nerve, the disc first turns pink and engorged (hyperemia), then the small central dip flattens out and fills in (cup filling), and then the sharp edge of the disc turns fuzzy (margin blurring). Doctors use exactly this sequence to grade how severe the papilledema is.
Step 3: Test whether vision function changes early.
Despite all this visible swelling, the nerve fibers that carry the pupil's light response usually keep working normally through the early and moderate stages. The pupils stay equal and reactive because the swelling has not yet destroyed enough nerve fibers to break that reflex.
Step 4: Note when pupil changes would appear instead.
A sluggish or unequal pupil reflex points more to optic neuritis, direct optic nerve injury, or very late, chronic papilledema with optic atrophy, not moderate papilledema.
Step 5: Conclude.
Since the pupillary reflex stays normal at this stage, it gives no useful information for diagnosing moderate papilledema.
\[ \boxed{\text{Impaired pupillary reflex}} \]
Hyperemia, filling of the cup, and blurring of the margins are all things a doctor sees directly on the retina through an ophthalmoscope. Impaired pupillary reflex is a functional test of the nerve pathway, not a fundus appearance.
Step 2: Walk through disc swelling in order.
As pressure rises inside the skull and reaches the optic nerve, the disc first turns pink and engorged (hyperemia), then the small central dip flattens out and fills in (cup filling), and then the sharp edge of the disc turns fuzzy (margin blurring). Doctors use exactly this sequence to grade how severe the papilledema is.
Step 3: Test whether vision function changes early.
Despite all this visible swelling, the nerve fibers that carry the pupil's light response usually keep working normally through the early and moderate stages. The pupils stay equal and reactive because the swelling has not yet destroyed enough nerve fibers to break that reflex.
Step 4: Note when pupil changes would appear instead.
A sluggish or unequal pupil reflex points more to optic neuritis, direct optic nerve injury, or very late, chronic papilledema with optic atrophy, not moderate papilledema.
Step 5: Conclude.
Since the pupillary reflex stays normal at this stage, it gives no useful information for diagnosing moderate papilledema.
\[ \boxed{\text{Impaired pupillary reflex}} \]
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