Degradation of swept-parameter VEP responses by neutral density filters in amblyopic and normal subjects.

Purpose: To determine whether objective visual function, measured by swept-parameter visual evoked potential (sVEP), is preferentially degraded by neutral density filtration (NDF) in normal control and fellow eyes compared to amblyopic eyes, and to determine whether the response to NDF is a function of stimulus type, using grating and vernier stimuli.

Methods: Monocular Snellen acuity and both grating and vernier sVEP responses were measured in each eye of 23 children or adolescents with amblyopia and 21 visually and neurologically normal children or adolescents. Acuity and sVEP responses were measured with and without a 2.

Defective motion processing in children with cerebral visual impairment due to periventricular white matter damage.

Aim: We sought to characterize visual motion processing in children with cerebral visual impairment (CVI) due to periventricular white matter damage caused by either hydrocephalus (eight individuals) or periventricular leukomalacia (PVL) associated with prematurity (11 individuals).

Method: Using steady-state visually evoked potentials (ssVEP), we measured cortical activity related to motion processing for two distinct types of visual stimuli: 'local' motion patterns thought to activate mainly primary visual cortex (V1), and 'global' or coherent patterns thought to activate higher cortical visual association areas (V3, V5, etc.).

Arachnoid cyst causing third cranial nerve palsy manifesting as isolated internal ophthalmoplegia and iris cholinergic supersensitivity.

An 8-month-old boy presented with anisocoria, a sluggishly reactive right pupil, and cholinergic supersensitivity as the only signs of what proved months later to be compressive third cranial nerve palsy due to an arachnoid cyst. Tonic constriction and dilation, segmental iris sphincter palsy, aberrant regeneration phenomena, ductional deficits, and ptosis were absent. The initial diagnosis was postganglionic internal ophthalmoplegia attributed to a viral ciliary ganglionopathy.

A case of intracranial hypertension and papilledema associated with nephropathic cystinosis and ocular involvement.

An 11 year old boy with nephropathic cystinosis developed moderate to severe bilateral optic disc edema two months after he received a deceased donor renal allograft. The bilateral optic disc edema was found to be a result of intracranial hypertension diagnosed by lumbar puncture. No etiology was found.

Visual outcome and corneal changes in children with chronic blepharokeratoconjunctivitis.

Objective: To describe the cause, management, and effect of chronic blepharokeratoconjunctivitis (BKC) on the cornea and visual function in children.

Design: Noncomparative, interventional, retrospective case series.

Participants: Twenty-seven children with BKC.

Cortical blindness: clinical and radiologic findings in reversible posterior leukoencephalopathy syndrome: case report and review of the literature.

Purpose: To alert ophthalmologists to the recognition of cortical visual loss as the presenting feature in patients with reversible posterior leukoencephalopathy syndrome (RPLES). Unique radiologic findings are paramount to the diagnosis.

Design: Interventional case report.