The human diencephalon is composed of several regions. The thalamus which relays sensory information to the cerebrum, processes visual and auditory stimuli, and generates some emotions, among other functions.he human diencephalon is composed of several regions. The thalamus which relays sensory information to the cerebrum, processes visual and auditory stimuli, and generates some emotions, among other functions.
The LASIK surgery is performed by an ophthalmologist who uses a laser or microkeratome to reshape the eye's cornea in order to improve visual acuity. For most patients, LASIK provides a permanent alternative to eyeglasses or contact lenses.
LASIK surgery is most appropriate for people who have a moderate degree of: 1  Nearsightedness (myopia), in which you see nearby objects clearly, but distant objects are blurry. 2  Farsightedness (hyperopia), in which you can see distant objects clearly, but nearby objects are blurry.