A teenage girl presented to the hospital emergency department with a three-week history of intermittent frontal headache, which was worse in the morning and associated with nausea, vomiting, lethargy, ...

Lack of pain Ischemic optic neuropathy, NMO-associated optic neuritis, LHON ... (vision loss rarely acute) Lack of an afferent pupillary defect Various maculopathies, bilateral optic neuropathy ...

Optics and photonics is the study of the fundamental properties of light and harnessing them in practical applications. Optics and photonics covers the entire electromagnetic spectrum from high ...

This is a type of defect that could indicate the partial or total failure of the layers of the road surface. Whilst not often requiring an immediate response, if left untreated there is an increased ...