1. Full field Electroretinography (ERG): Test which measures the electrical responses of various cell types in the retina, including the photoreceptors (rods and cones), inner retinal cells (bipolar and amacrine cells). Used to diagnose various retinal degenerations like
| |
Retinitis pigmentosa and their variants |
| |
X-linked juvenile retinoschisis |
| |
Heredo-macular degenerations |
| |
Retinal Vascular occulsions |
| |
Intraocular Foreign Body |
2. Multifocal Electroretinography (mfERG): Multifocal electroretinography (mfERG) is a valuable technique in assessing macular function in retinal disease objectively. Used to record separate responses for different retinal locations. Used in detection of
| |
Macular dystrophies |
| |
Macular hole |
| |
X-linked retinoschisis |
| |
Drug toxicity |
| |
Multifocal choroditis |
| |
White-dot syndrome |
3. Electrooculogram (EOG): To assess the function of outer retina and Retinal Pigment Epithelium (RPE).
| |
To confirm Best disease |
| |
Suspected drug toxicities |
4. Pattern Electroretinogram (PERG): This test provides information about central macular and retinal ganglion cell layer function. Also used to differentiate vision loss due to retinal or optic nerve diseases. PERG used in evaluation of
| |
Glaucoma and ocular hypertension, |
| |
Optic neuritis other optic neuropathies, |
| |
Maculopathies |
5. Visually Evoked Responses (VEP): The VEP is a test to detect problems with the optic nerve and lesions in the anterior part of our visual pathway. VEP tests are used to evaluate
| |
Optic neuritis, |
| |
Compressive Optic neuropathy, |
| |
Toxic amblyopia |
| |
Cortical Blindness |
| |
Demyelenating diseases such as multiple sclerosis. |
| |
Unexplained visual loss |
6. Multifocal Visually Evoked Responses (mfVEP): This test allows for topographical assessment of visual field. In this test multiple individual VEP responses are recorded simultaneously from 60 or so regions of the central 20 to 25° radius of the visual field. This is also known as objective visual field peimetry. Indications are
| |
Diagnosing and Following of Optic Neuritis/Multiple Sclerosis |
| |
Unexplained visual loss |
| |
Detecting and following of Glaucomatous damage |
| |
Confirming unreliable or questionable fields |
|
