Background. Idiopathic intracranial hypertension can cause rapid deterioration of visual acuity in some severe cases, and these cases are usually thought to have "malignant" form of this disease. Case. In this paper, we report on a 16-year-old girl who is a typical example for malignant idiopathic intracranial hypertension with a rapid recovery of visual acuity after lumboperitoneal shunt opera...

The underwater visual acuity (the angle subtended by the minimal resolvable line width of high contrast square wave gratings at a viewing distance of 2m) of two male harbor seals was determined at different levels of water turbidity. Starting with visual acuity angles of 5.5' and 12.7' in clear water we found visual acuity to decrease rapidly with increasing turbidity at rates of 7.4' and 6.0' ...

AIMS To determine the long term visual outcome of patients who were eligible for randomisation to enucleation versus brachytherapy in a US collaborative ocular melanoma study (COMS) but were treated with either helium ion or 125I radioactive plaque therapy. METHOD A retrospective analysis was performed of 426 ciliochoroidal melanomas that met COMS inclusion criteria for randomisation to enucl...

A 47-year-old female had noticed diminished visual acuity in both eyes 2 months previously. The patient had vision loss (no light perception) in her right eye on admission. Her left visual acuity was 1.2 (naked vision) and an upper temporal quadrant hemianopsia was revealed in her left eye. Optic disc atrophy was also found bilaterally during a fundus examination. The tumor was located at the t...

purpose: uncorrected visual acuity is the only variable measured in vision screening programs in many countries worldwide. the aim of this study was to calculate the sensitivity, specificity, and predictive value of the uncorrected visual acuity in the screening programs for the diagnosis of refractive errors. methods: in this cross-sectional study, of 4,157 students in the first year of primar...

background and objectives:purtscher's retinopathy occurs with sudden loss of vision. in this article, a case of post-partumpurtscher's-like retinopathy was investigated. case report:the patient was an 18-year-old woman who presented with severe bilateral loss of vision, three days after childbirth. no systemic abnormalities were observed except preeclampsia. the results of ophthalmosc...

f l t i s e r m s c i t d o o ( t m s a e Diabetic retinopathy (DR) remains the leading cause of blindness among working-age people in developed countries1. Tight control of blood glucose levels and blood pressure is essential for preventing or arresting DR development. However, therapeutic objectives are difficult to achieve and DR therefore occurs in a high proportion of patients. Once DR app...

CLINICAL CASES Four cases of patients simulating eye problems are reported. The patients included: an adopted 9 year-old girl complaining of bilateral visual loss, a 10 year-old girl with school and family problems complaining of decreased visual acuity, a 22 year-old female mentioning unilateral visual loss after a car accident, and a 30 year-old female complaining of decreased visual acuity a...

Vision is the most significant of our senses. It is important for good quality of life and its loss leads to morbidity, disability, loss of productivity and depression. The impairment is prevalent. In the United Kingdom nearly one million people are severely visually impaired (1). More than 3.4 million (3%) Americans aged 40 and older are either blind (visual acuity of 2/200 or have a visual fi...

BACKGROUND To determine the extent of visual field loss in patients who had required a pars plana vitrectomy secondary to complications of proliferative diabetic retinopathy. METHODS Patients that had undergone a vitrectomy on at least one eye for treatment of either vitreous haemorrhage or tractional retinal detachment were selected for study. ETDRS acuity and Humphrey binocular Esterman vis...