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.
2 How old do you have to be to get lasik eye surgery? Dr. Richard Carlin Dr. Carlin. 18 - 21: The fda says 18 for nearsighted and 21 for farsighted and astigmatism. More importantly is to wait until youreyes are stable, not changing from year to year.