What is the use of Electrooculogram?

What is the use of Electrooculogram?

Electrooculography (EOG) is a technique for measuring the corneo-retinal standing potential that exists between the front and the back of the human eye. The resulting signal is called the electrooculogram. Primary applications are in ophthalmological diagnosis and in recording eye movements.

Why is EOG important?

The electro-oculogram (EOG) investigates abnormalities of the outermost layer of the retina, the retinal pigment epithelium, allowing the early diagnosis of some inherited macular diseases such as Best disease. The EOG is used to assess the function of the pigment epithelium.

How accurate is EOG?

Electro-oculography Recordings of eye movement are accurate to about 0.5 degree, but it is still less sensitive than visual inspection, which can perceive movements of about 0.1 degree.

What is EOG for eye tracking?

Another method used for eye tracking is electrooculography (EOG). EOG measures the movement of the eye via the voltage difference between the cornea and retina (Brown et al., 2006). Therefore, EOG is relatively economical, and powerful, and has a simple acquisition approach with a fast user response.

What is the meaning of electro Oculography?

Definition of electrooculogram : a record of the difference in electrical charge between the front and back of the eye that is correlated with eyeball movement (as in REM sleep) and obtained by electrodes placed on the skin near the eye.

What is the difference between ERG and EOG?

The EOG had advantages over the ERG in that electrodes did not touch the surface of the eye. The changes in the standing potential across the eyeball were recorded by skin electrodes during simple eye movements and after exposure to periods of light and dark.

Why is it important to properly prepare the skin where you are going to place electrodes for an EOG?

EEG–EOG–EMG Electrode Placement and Application. To generate EEG, EOG, and EMG recordings, electrodes are placed on the scalp and skin surfaces. The site must be cleaned and properly prepared to assure good contact and limit electrical impedance to 5000Ω Ω or less.

Why is it important to recognize artifacts in your data trace?

Why is it important to recognize artifacts in the data trace? To ensure that analysis of data is reliable. If you falsely identify artifact data as voltage difference measurements, you would draw false conclusions as to what the max/min/mean amplifications mean.

How is the EOG signal generated?

EOG signal is generated by the potential difference between cornea and retina. Different eye movements produce various EOG wave patterns. Often pairs of the electrodes are placed around the eye. Typically EOG amplitudes range between 0.05 and 3 mV and a frequency band from DC to 50 Hz.

What is the full form of EOG?

End on Generation (EOG) is the system used on fully air conditioned Rajdhani and Shatabdi trains.

What does an abnormal ERG mean?

What does an abnormal ERG mean? An abnormal ERG result suggests abnormal function of the retina which may be caused by a number of diseases of the retina. The results of the ERG will be discussed with your doctor.

What is important to correctly prepare electrode attachment sites?

To prepare the skin for electrode placement, dry, dead epidermal layers of skin must be removed, along with any natural oils and dirt that impede electrical flow and thus create a resistance to signal quality.