At Nepal Eye Hospital, we are committed to providing advanced diagnostic facilities to support early detection, accurate diagnosis, and effective management of a wide range of eye and visual pathway disorders. Our Electrodiagnostic Services include Electroretinography (ERG), Electro-oculogram (EOG), and Visual Evoked Potential (VEP) – internationally recognized tests that assess retinal and visual pathway function beyond what is possible with routing eye examinations.
- Electro-Retinography (ERG)
ERG measures the electrical responses of various cell types within the retina (rods, cones and ganglion cells) when stimulated by light.
Why it is done?
– Early detection of retinal dystrophies
– Assessment of macular function in unexplained vision loss
– Evaluation of retinal toxicity due to long term drug use
– Differentiating between retinal and optic nerve diseases
Types Available: Full-field ERG, Multifocal ERG and Pattern ERG - Electro-Oculogram (EOG)
EOG records the standing electrical potential of the eye during eye movements, providing information about the retinal pigment epithelium (RPE) function.
Why it is done?
– Diagnosis of Best Vitelliform Macular Dystrophy and other RPE – related disorders
– Assessment of generalized retinal dysfunction when ERG alone is inconclusive - Visually Evoked Potential (VEP)
VEP measures the electrical signals generated in the brain visual cortex in response to visual stimuli, helping to assess the integrity of the visual pathway from the eye to the brain.
Why it is done?
– Evaluation of optic nerve disorders (Optic Neuritis, Optic Neuropathy)
– Early detection of Multiple Sclerosis and other demyelinating diseases
– Assessment of vision in children and patients unable to cooperate with routine tests
– Differentiating between functional and organic vision loss