CONTACT LENS FIT PROGRAM Hitting the space bar brings up a list of modifications that can be made-highlight the one you want and hit ‘enter’. Most of these are self-explanatory. The zoom in item fills the screen with just the fluorescein pattern. The contact lens values can be changed from the above pop-up menu by choosing the last item on the list or more quickly by hitting the ‘tab’ key and getting the lens parameter pop-up menu directly. Highlight the parameter you want to change using the PgUp and PgDn keys and then the arrow keys to change the value.