The purpose of this study is to evaluate the diagnostic value of central retinal artery Doppler study in case of increased intracranial pressure.
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Central retinal artery resistivity index
Timeframe: From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 6 months
peak systolic velocity ( cm/s)
Timeframe: From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 6 months
end diastolic velocity ( cm/s )
Timeframe: From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 6 months