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:)
I buy new glasses whenever the mood strikes. I have about 6 pair right now (including sunglasses). I don't have vision insurance b/c I buy soooo many it seems like a waste. I've been wearing glasses forEVER so they are like earrings to me.