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Increased Ocular Pulse Amplitude Associated with Unilateral Dysgenesis of the Orbital Roof
Ami Shah Vira1, Ashraf M Mahmoud2, Cynthia J Roberts2
1Department of Ophthalmology, The Ohio State University, Columbus, Ohio, USA.
Introduction:
Two patients (one with neurofibromatosis type 1) presented with unilateral ocular pulsation.
Methods:
A CT scan of the orbits revealed extensive dysgenesis of the orbital roof with herniation of the frontal lobe into the orbit in both cases. PASCAL dynamic contour tonometry was performed.
Results:
The ipsilateral ocular pulse amplitude (OPA) was greater than the contralateral side, and the ocular pulse waveform morphology more closely approximated the known intracranial waveform in these patients.
Conclusions:
We hypothesize that the greater OPA was due to stronger transmission of the intracranial pressure waveform amplitude and morphology in the absence of the orbital roof.
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