A streak retinoscope is used to assess a refractive error of an eye. It is also used to viewing the eye under examination. A streak of light is reflected off of a front surface mirror. This light is emitted from the instrument and the streak type can be rotated 360 degrees.
A stress ball is a malleable toy. It is usually not more than 7cm in diameter. It is squeezed in the hand and manipulated by the fingers, ostensibly to either help relieve stress and muscle tension or to exercise the muscles of the hand.
