By building a wired passive stylus we have added pressure sensitivity to existing capacitive touch screen devices for less than $10 in materials, about 1/10th the cost of existing solutions. The stylus makes use of the built-in audio interface that is available on most smartphones and tablets on the market today. Limitations of the device include the physical constraint of wires, the occupation...

The Electronic System and Information Technology Research Group at Brunel University has designed a multifaceted navigation system for blind and visually impaired pedestrians. The primary operation of the system mimics the advantages of an informed sighted guide by using Global Positioning Systems and remote (sighted on the user) video cameras as navigational sensors. The information generated ...

Posterior Reversible Encephalopathy Syndrome (PRES) is a clinicoradiological term which implies that the patient has a reversible vasogenic edema of the brain. Its clinical features include confusion, seizures, headache and visual disturbance. We present here a case of a woman who acquired posterior reversible encephalopathy syndrome after developing eclampsia intrapartum. She was treated with ...

To cite: Man BL, Fu YP. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/ bcr-2013-202803 DESCRIPTION We report the case of a 52-year-old man who was a chronic smoker and enjoyed good past health. He was admitted for progressive left-sided weakness and mild headache. He did not have any blurring of vision, diplopia or change in mental status. He was alert and his blood...

We examined 4 patients in the past 6 years who were first seen at our institution because of metamorphopsia and who were eventually diagnosed as having idiopathic intracranial hypertension (IIH). Idiopathic intracranial hypertension is a condition of elevated intracranial pressure that occurs primarily in young women. Neuroimaging findings and cerebrospinal fluid (CSF) indices are normal. Its c...

Pseudotumor cerebri or benign intracranial hypertension is characterized by increased intracranial hypertension without evidence of a mass lesion or ventricular obstruction. Symptoms are mainly headache and papilledema. If untreated, papilledema can cause progressive irreversible visual loss and optic atrophy. Usually occurs in obese women and in the childbearing years. It is a diagnosis of exc...

Not only did diffuse loss mean deviation appear, but abnormal areas appeared with high intraocular pressure in the present patient. If corneal edema affected visual field, only diffuse loss would occur. Refractive error was corrected at examination of FDT. Good visual acuity was maintained under high intraocular pressure. In conclusion, FDT perimetry may show intraocular pressure–dependent, rev...

The visual acuity of five divers in a dry pressure chamber was measured with a Landolt C test. Only one of them showed a significant reduction at 7.0 atm. These results contrast sharply with open sea experiments, which show a considerable reduction at much lower pressures (Baddeley, 1968). It is suggested that besides stresses, luminance differences, also turbidity, as a function of depth may a...