DDVUS - 2pcs Soft Rubber Eyepiece Eye Shield 29-30mm Eye Guards Cups For Binocular Microscope

why not kill a microscope heads have to adjustment the distance between the eye tubes called the inter ocular distance and the separate focus of one of the eye tubes called the diopter adjustment there is a scale between the eye tubes which is used to set the correct distance in millimeters between the eyes in this example the scowl runs from 48 to 75 taking time to adjust this distance and to remember the scale reading allows microscopes to be adjusted for your personal distance immediately many individuals have eyes that focus differently the eye tubes of most high power microscopes have one often the left hand which will focus independently of the other to set these correctly look through the fixed eye tube with the other eye closed focus a specimen with the microscope controls close this eye and open the other and without altering the controls of the microscope move the dielectric r