syn-, sy-, sym-, syl-, sys-
(Greek: with, together with; also by extension: united; same, similar; at the same time)
2. Intense hypotension (low blood pressure) and bradycardia (abnormally slow heartbeat) following carotid sinus stimulation, resulting in dizziness, fainting or convulsions, and occasionally other neurologic symptoms.
This may be accomplished in the form of an injection of a local anesthetic into the ganglia concerned for temporary inducement or the injection of alcohol or phenol for permanent inducement.
2. The synthesis of organic compounds using chemical energy derived from the oxidation of simple inorganic substrates.
2. CVS is caused by the decreased blinking reflex of the eyes while working long hours focusing on computer screens.
The normal blinking rate in human eyes is about 16–20 blinks per minute and recent studies have shown that the blinking rate decreases to as low as 6–8 blinks a minute for people who are working on computer screens for long periods and this can lead to an irritating condition called dry eyes.
3. A variety of problems related to prolonged viewing of a computer screen.
Short term effects include dry eyes, blurred vision, eye fatigue and excessive tearing.
Long term effects include migraines, cataracts, and visual epilepsy.
Some solutions include keeping reflections and glare to a minimum and to provide a non-fluorescent, uniform light source.
Special lamps are available that maintain the proper light around the monitor and generate light at much higher frequencies than regular light bulbs.
Glasses Can Correct Near and Far, but What About Those Screens in Between?
More people are showing up at eye appointments complaining of headaches, fatigue, blurred vision and neck pain—all symptoms of computer-vision syndrome (CVS), which affects about 90% of the people who have spent three hours or more a day at a computer, according to the National Institute for Occupational Safety and Health.
2. Ordinarily symbiosis where the association is advantageous, or often necessary, to one or both, and not harmful to either.
3. When there is a bodily union in extreme cases so close that the two form practically a single body, as in the union of algae and fungi to form lichens, and in the inclusion of algae in radiolarians (any of various marine protozoans of the group Radiolaria, having rigid skeletons usually made of silica).
2. Premature fusion of the cranial sutures, usually occurring before birth, and resulting in deformity of the skull.
The fusion prevents the normal shape given to the cranium by the growth of the brain; therefore, fusion of the sagittal suture (line of union between the two parietal bones or side bones of the skull), the most common form, prevents lateral growth and allows compensatory expansion forward and backward, giving a long, narrow shape of the head, sometimes with a ridge at the metopic suture (persistent frontal suture or the seam or line at which two edges have been joined between the two halves of the frontal bone line (scaphocephaly).
Asymmetrical forms also occur.