Microperimetry as a diagnostic tool for the detection of early, subclinical retinal damage and visual impairment in multiple sclerosis.

Background: A majority of multiple sclerosis patients experience visual impairment, often as the initial presenting symptom of the disease. While structural changes in the retinal nerve fiber layer and optic nerve have demonstrated correlations with brain atrophy in multiple sclerosis using magnetic resonance imaging, a non-invasive, cost-effective, and clinically efficacious modality to identify early damage and facilitate prompt therapeutic intervention to slow the progression of multiple sclerosis and its ocular manifestations, is still urgently needed. In this study, we sought to determine the role of macular sensitivity measured by microperimetry in the detection of subclinical multiple sclerosis-related retinal damage and visual dysfunction.

Conductive polymer for ultra-broadband, wide-angle, and polarization-insensitive metamaterial perfect absorber.

We numerically and experimentally investigate a broadband, polarization-independent and wide-incident-angle metamaterial perfect absorber (MPA) based on conductive polymer. By optimizing the electrical conductivity of the polymer, a 16.7 GHz broadband MPA is observed with the absorptivity greater than 80% for both transverse magnetic and electric polarization.

A rare case of odontogenic parainfectious intraorbital optic neuritis with the absence of clinical manifestation of orbital cellulitis.

Purpose: To report the case of a 67-year-old male patient with odontogenic maxillary sinusitis who presented with unilateral parainfectious intraorbital optic neuritis without clinical signs and symptoms suggestive of orbital cellulitis. Despite the absence of clinical signs, taking a thorough history and obtaining the appropriate neuroimaging study raised the suspicion for an infectious etiology as the cause of optic neuropathy and stopped the continuation of corticosteroid treatment.

Methods: Retrospective case report.