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.
Different areas of the brain are involved in memory depending on the type of memory. 1  Short-term memory, also called working memory, occurs in the prefrontal cortex. 2  It stores information for about one minute and its capacity is limited to about 7 items.he brain is composed of three parts: the brainstem, cerebellum, and cerebrum. The cerebrum is divided into four lobes: frontal, parietal, temporal, and occipital. 1  The cerebrum is the largest part of the brain and is composed of right and left hemispheres.