Something that causes a response in a body part or organism. A stimulus may be internal or external. Sense organs, such as the ear, and sensory receptors, such as those in the skin, are sensitive to external stimuli such as sound and touch.
Just curious...given my insurance plan I can get a new pair of frames and lenses once every 2 years, but I realllly love glasses so I tend to purchase about 2 pair per year...Gotta have my style...oh and of course the added benefit of sight is a nice plus:)
Here are some tips: 1  Bright and early. If you have new prescription glasses, put them on first thing in the morning. Never switch to them halfway through the day. The sudden difference could make you feel disoriented and not quite right. 2  Doctorâs orders. Contact lenses are actually medical devices. Because they touch your eyes, itâs really important to follow the instructions your doctor gives about the adjustment period. Wear them only when and for how long your doctor tells you, and make sure you follow cleaning instructions too. Warning signs. New eyewear shouldnât hurt.