Step one. Choose a lens with enough depth to clear the cornea entirely. Scleral lenses by definition do not touch the cornea. If you put a lens on the eye that touches the cornea, it is simply not deep enough. Moving to a lens with greater depth will eventually lead to a lens that clears the cornea entirely.
Guide. An electroencephalogram (EEG) is a test that measures and records the electrical activity of your brain. Special sensors (electrodes) are attached to your head and hooked by wires to a computer. The computer records your brain 's electrical activity on the screen or on paper as wavy lines. Certain conditions, such as seizures, can be seen by the changes in the normal pattern of the brain 's electrical activity.
The electroencephalogram (EEG) is a measure of brain waves. It is a readily available test that provides evidence of how the brain functions over time. 1  The EEG is used in the evaluation of brain disorders. 2  Most commonly it is used to show the type and location of the activity in the brain during a seizure. The EEG is used in the evaluation of brain disorders. 2  Most commonly it is used to show the type and location of the activity in the brain during a seizure. 3  It also is used to evaluate people who are having problems associated with brain function.