Frequently Asked Questions
If you don’t see the information you need, please contact us.
- What is a VEP Pediatric Vision Test?
- Can I be with my child during the test?
- How should I prepare my child?
- How is the test done?
- What else do I need to know?
- What can I expect after the test?
VEP and EEG Technology
- What is Visual Evoked Potential (VEP)?
- What is Electroencephalograph (EEG)?
- What is the relationship between VEP & EEG technology?
- What is amblyopia?
- What causes amblyopia?
- Can anything be done to treat amblyopia and prevent vision loss?
- When should treatment for amblyopia begin?
- What treatments are available?
- What treatment follows the correction of the underlying cause?
- What happens if amblyopia goes untreated?
- How many people have amblyopia?
What is a VEP Pediatric Vision Test?
It is a painless, safe, non-invasive vision test to check the complete visual system of your child including the nerve pathway between the eyes and the brain. It is much more than a common eye test for kids.
It is important that your child feel relaxed and comfortable so the test results are accurate. For younger children it may be helpful to bring a favorite item such as a blanket, pacifier, or toy that will make them feel more comfortable.
How is the test done?
The technician will attach three small sensory pads to the child’s head using a washable gel material. Your child will be seated in front of a screen and asked to stare at the center. The screen has fun pictures and a black and white pattern that quickly reverses. One eye is covered while the other eye is tested. A computer records the child’s response.
What can I expect after the test?
After the VEP vision test the technician will remove the sensory pads and use a small amount of water to remove any gel residue. The test results will be given to your doctor.
VEP & EEG Technology
What is Visual Evoked Potential (VEP)?
Visual Evoked Potential is a non-invasive testing method that provides objective information about the entire vision system. VEP provides a means to measure the complete visual pathway, from the lens to the visual cortex, to detect mechanical or neural abnormalities related to vision. These problems are often subtle and difficult to detect.
The VEP is an electrical signal generated in response to a known visual stimulus. The potential is an electrical response to a stimulus. The Enfant® testing system uses visual stimuli in a specific pattern to evoke the electrical response, or potential, in the brain. It then measures the potential from the visual pathway of each eye, compares the two sets of data, and identifies if there is a significant difference.
What is Electroencephalograph (EEG)?
The Electroencephalograph (EEG) is a neurological test which measures electrical activity of the brain. To do an EEG a patient has sensory pads applied to various locations on the head. A test device records the electrical signals from these sensory pads and plots the data for evaluation. The EEG can be tailored to evaluate specific functions of the brain.
What is the relationship between VEP and EEG technology?
The VEP is a tailored EEG Test. The VEP is used to test the functionality of the brain’s vision system from the eye to the visual cortex. The Enfant® Pediatric VEP Vision Testing System uses VEP technology with black and white lines of varying sizes as the stimulus. The Enfant® eye test for kids requires only three sensory pads to acquire the data required to assess the patient’s vision function.
What is amblyopia?
Amblyopia is poor vision in an eye that otherwise appears normal. It is sometimes called “lazy eye.” Amblyopia occurs when the brain does not recognize the sight from that eye. Eventually, the brain stops using the weaker eye, causing poor vision or even blindness in that eye.
What causes amblyopia?
Amblyopia has many causes. It may occur as a results from a misalignment of a child’s eyes (often seen by an observer as crossed eyes, or divergent eyes), from a difference in image quality between the two eyes (one eye focusing better than the other), or any other condition that may cause the electrical signal generated by the eye to be of poor quality or delayed in getting to the brain. In most cases, one eye becomes stronger than the other. If this condition persists, the brain stops using the weaker eye, causing poor vision or even blindness in that eye.
Can anything be done to treat amblyopia and prevent vision loss?
With early diagnosis and lazy eye treatment, the vision in the amblyopic eye may be restored. Take our Online Vision Quiz and learn more about the warning signs of vision problems in children.
What treatments are available?
Before treating amblyopia, it may be necessary to first treat the underlying cause. Glasses are commonly prescribed to improve focusing or misalignment of the eyes. In extreme cases surgery may be required to allow both eyes to work together.
Patching or covering one eye may be required for a period of time. The better-seeing eye is patched, forcing the “lazy eye” to work, thereby strengthening its vision.
Medication, in the form of eye drops or ointment, may be used to blur the vision of the good eye in order to force the weaker one to work.