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.
In the Consumer Reports survey, a majority of the respondents (65 percent) had Lasik as their most recent surgery. Only 5 percent reported having PRK, Lasek, or epi-Lasik. But it's important to note that nearly a third of the respondents (28 percent) were unsure about what type of surgery they had.