necessary also if the telemicroscope does not prove to be suitable for a particular patient then the telemicroscope can be easily removed from the spectacles as indicated in fig2 the angle a between optical axis 30c and the central axis 32 of spectacles 12 is approximately fifteen degrees angle a will of course vary for any particular implementation of telemicroscope 10 depending upon such factors as the size of lens 16 and the position of telemicroscope 10 with respect to that lens to utilize telemicroscope 10 to view an object located along the wearer 39 s normal viewing axis i e central axis 32 in fig2 all that is required is a downward head tilt and corresponding upwards eyeball rotation through an angle equal to that of the angle a e g fifteen degrees this position is shown in fig3 referring now to fig2 and 4 focusing mechanism 28 will now be described it comprises a lever 62 a guide pin 64 a self tapping screw 66 and a support boss 68 which is a unitary cylindrical extension of outer sleeve 34c of upper housing 34 lever 62 includes a lever arm 62a and a base 62b base 62b includes a hole 62c therein which fits over boss 68 to permit pivotal movement of lever 62 about boss 68 screw 66 threads into the center of boss 68 to retain lever.