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.
1 In a LASIK operation, a flap in the cornea is created, and the laser vision correction takes place deep within the cornea, rather than on the surface. 2  LASIK is a more advanced form of laser eye surgery that can treat a broader range of vision imperfections, and offers many other benefits as well.