a 22 year-old woman presented with gradual visual loss in her right eye since 1990. medical and family histories were unremarkable. her visual acuity was 20/80 and 20/20 in right and left eyes respectively. slit lamp examination was quite normal with no relative afferent papillary defect.fundi of both eyes revealed subretinal lesion with optic nerve head involvement and subretinal fluid in papi...

Intracranial hypertension occurs with significant regularity during general anaesthesia. Although majority of times it goes unrecognised and does not cause significant perioperative morbidity, its importance cannot be ignored especially in patients with intracranial pathologies. The intracranial tension can rise significantly during prolonged extreme positioning like steep trendelenburg positio...

The ratio of disc to macula/disc diameter is characteristically increased in eyes with optic nerve hypoplasia. We present the largest reported series of patients with a definitive diagnosis of optic nerve hypoplasia for whom this ratio has been determined. All measurements were made by an independent masked observer. Our results are in accordance with previous reports. A ratio of 2.94 provides ...

BACKGROUND To report on the optic nerve sheath diameter (ONSD) in patients with normal-tension glaucoma (NTG) compared with controls without known optic nerve (ON) or intracranial disease. METHODS In 18 patients with NTG (mean age 64.9 ± 8.9 years; 7 women and 11 men), CT of the orbit was performed. 17 age- and gender-matched patients without ON or intracranial disease, who underwent CT of th...

INTRODUCTION Glaucoma is the second leading cause of vision loss in the world. Characterized by progressive and irreversible vision loss, it affects more than 60 million people world-wide [1]. The pathogenesis of this disease is not fully understood however glaucoma has been positively correlated with elevated pressure inside the eye. Patients with glaucoma show significant deformations in the ...

OBJECTIVE There are several approaches to sonographic imaging and measurement of the optic nerve sheath diameter (ONSD). In this study, we sought to compare visual axis measurements of the optic nerve sheath (ONS) with traditional coronal axis measurements to assess for correlation. METHODS The ONS was visualized in 2 views on both eyes of healthy volunteers using an 8.5-MHz probe. Coronal ax...

AIMS To determine the age related changes in optic nerve head structure in a group of normal subjects and assess the significance of any changes in relation to those found in open angle glaucoma. METHODS A group of 88 white volunteers and friends and spouses of patients with a normal visual field and normal intraocular pressure was studied. Two different imaging and measurement devices were u...

OBJECTIVE To find correlations between diameters of the optic nerve sheath (ONSD), the eyeball, and the optic canal that might be important for intracranial pressure monitoring. METHODS In a prospective cohort study, the CT data of consecutive 400 adults (18+) with healthy eyes and optic nerves and absence of neurological diseases were collected and analyzed. When the CT scans were obtained, ...