point 14 which is approximately at the center of the eyelash when the eye is closed if not interrupted by the eyelash the beam continues on to impinge on the detector module assembly 15 supported by attachment member 16 from the eyeglass frame 10 fig2 is a top view showing the position of the light beam being intersected by the eyelash when the right eye is closed the angled position of the beam allows the detector module assembly 15 to be mounted close to the glasses 39 frame at the nose for easier fit emitter module assembly 11 consists of a light beam source such as an infrared light emitting diode 17 mounted in an enclosure 18 along with a lens 19 and an anti reflecting light absorbing member 20 the lens is placed such as to produce a focused beam at point 14 which is close to the centerline of the eye and the most dense part of the eyelash the enclosure 18 is supported by a bendable attachment member 12 which is fixed to the eyeglass frame 10 which is in turn supported by the standard nose pads on the eyeglasses the bendable member 12 may be bent to change its circular shape and thereby to adjust the fore and aft position of emitter assembly 11 and it may be twisted to change the angular adjustment of the light beam 13 within enclosure 18 is a nonreflecting rough and blackened inner surface cylinder 20 which absorbs light and thereby prevents the reflection of non focusable light rays from impinging on lens 19 and subsequently scattering into the eye light emitting diodes led 39 s normally emit a very broad light beam lenses on led 39 s are common to reduce the beam spread.