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 eye surgery patients are in overall good health and free of eye diseases. Patients with keratoconus, glaucoma, cataracts and certain retinal and optic nerve diseases are not good candidates for laser eye surgery. Good candidates are free of eye viruses such as herpes simplex and herpes zoster.