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:)
That means youâll need approximately twelve lenses for the year per eye. If your lenses are sold six to each box, youâll need 2 boxes per year, per eye. If you purchase your contacts for $45/box, youâll spend $180 per year on your lenses.