Which tests are included in the initial evaluation for IIH (Idiopathic Intracranial Hypertension)?

Which tests are included in the initial evaluation for IIH (Idiopathic Intracranial Hypertension)?

• A. RNFL OCT, Visual Field, FAF, BP, and urgent MRI/MRV with LP
• B. Slit-lamp examination only
• C. CT scan of the chest
• D. Blood glucose and HbA1c only

Answer: (A)

Initial evaluation for IIH aims to document the optic nerve swelling and its impact on vision while actively ruling out other causes of raised intracranial pressure. That pathologic picture is best captured by combining structural and functional eye tests with appropriate systemic and neuroimaging workup. RNFL OCT quantifies the thickness of the retinal nerve fiber layer to document edema and monitor changes over time. Visual field testing reveals functional impact from papilledema, which often progresses even before symptoms are noticed. Fundus autofluorescence can help characterize and track edema-related changes in the retina, adding supportive documentation of the optic nerve involvement. Checking blood pressure helps differentiate hypertensive effects from true IIH and guides overall management. Urgent MRI with MRV assesses for alternate causes such as mass lesions or cerebral venous sinus thrombosis, which must be excluded before concluding IIH. If imaging is reassuring, performing a lumbar puncture to measure opening pressure confirms elevated intracranial pressure and helps exclude infection or inflammatory processes. The other options don’t address the intracranial and optic nerve aspects as comprehensively: slit-lamp examination focuses only on the anterior segment, a CT chest is unrelated to this condition, and screening of blood glucose and HbA1c does not address the intracranial hypertension or optic nerve edema.

Initial evaluation for IIH aims to document the optic nerve swelling and its impact on vision while actively ruling out other causes of raised intracranial pressure. That pathologic picture is best captured by combining structural and functional eye tests with appropriate systemic and neuroimaging workup. RNFL OCT quantifies the thickness of the retinal nerve fiber layer to document edema and monitor changes over time. Visual field testing reveals functional impact from papilledema, which often progresses even before symptoms are noticed. Fundus autofluorescence can help characterize and track edema-related changes in the retina, adding supportive documentation of the optic nerve involvement. Checking blood pressure helps differentiate hypertensive effects from true IIH and guides overall management. Urgent MRI with MRV assesses for alternate causes such as mass lesions or cerebral venous sinus thrombosis, which must be excluded before concluding IIH. If imaging is reassuring, performing a lumbar puncture to measure opening pressure confirms elevated intracranial pressure and helps exclude infection or inflammatory processes. The other options don’t address the intracranial and optic nerve aspects as comprehensively: slit-lamp examination focuses only on the anterior segment, a CT chest is unrelated to this condition, and screening of blood glucose and HbA1c does not address the intracranial hypertension or optic nerve edema.