ABSTRACT
To compare ipsilateral and contralateral carotid wall thickness in patients with acute unilateral non-arteritic anterior ischemic optic neuropathy [NAION]. This prospective case series included 17 [10 male and 7 female] patients with unilateral NAION of less than 8 weeks' duration who underwent B-mode ultrasonography to measure intima-media thickness [IMT] in the common carotid and internal carotid arteries. IMT values of the affected side were compared with those on the contralateral side. Mean patient age was 59.6 +/- 10.8 [range 45-74] years. Mean interval between onset of NAION and measurements was 27.6 +/- 13.2 [range 10-45] days. Mean IMT of both common and internal carotid arteries on the affected side [1.19 +/- 0.14 and 1.41 +/- 0.29 mm, respectively] was significantly [P<0.001] higher than the noninvolved side [0.92 +/- 0.11 and 0.83 +/- 0.2, respectively]. NAION may be accompanied by increased carotid wall thickness. Carotid wall thickness measurement using ultrasound in patients with NAION may be useful to identify concomitant carotid artery disease
ABSTRACT
To evaluated the correlation between intracranial pressure [ICP] and intraocular pressure [IOP]. This interventional case series included 90 patients undergoing lumbar puncture [LP] for neurologist evaluation. IOP was measured before and 1 hour after the LP by using Goldmann tonometer. Patients were compared into two groups: patients with normal ICP [<20 cmH2O] and patients with high ICP [>/=20 cmH2O]. Patients included 29 male and 61 female subjects with mean age of 32.9 +/- 11.4 [range 13-62] years. Thirty-three patients had normal ICP and 57 patients had high ICP. There was a significant correlation between ICP and IOP such that 71.9% of the high ICP group had high IOP [>/=21 mmHg] and 28.1% of them had normal IOP [P<0.001]. Significant decrease in IOP occurred after LP in the high ICP group [P< 0.001]. It seems that there is a significant correlation between IOP and ICP
ABSTRACT
To determine normal values of standard full field electroretinography [ERG] and to evaluate variation with age in an Iranian population. The amplitudes and implicit times of ERGs from 170 normal subjects aged 1 to 80 years were recorded according to the International Society for Clinical Electrophysiology of Vision. Study participants included clients for spectacles, other patients' attendants and personnel of the hospital. Light-adapted ERG including single-white flash, 30-Hz flicker as well as dark-adapted ERG including rod, maximal darkadapted and cone responses were compiled. There were no significant differences between men and women, or between right and left eye in terms of amplitude or implicit times of ERG. An increase in amplitude and implicit time was observed in 70-80 year-old subjects as compared to younger individuals [P=0.04 and P=0.03, respectively]. ERG records are significantly diminished with advanced age. Our results are a suitable reference for evaluation of standard ERG responses