This is how the directions would sit on that lens called Kluyll. They will be etched into the star iron material although this is just a rough sketch
The middle circular area would be the lens kluyll itself made from glass that was formed by lightning. Lightning hitting the snow huve and mineral filled desert gha'nura forming the glass in real life that is called fulgurites based on my quick research will definitely dig into that later
I am still using the crescent moon idea as the base of my glyphs since I already have the binary moon in my lore. It is just a matter of positioning the smaller moon eghi around the bigger or older moon ughu to make them look cohesive. So the small dot is eghi the crescent moon is ughu and that thing on the base represents direction or path.
On the lens I added some amber color stones when hit by light they add some interest on the design. The lens is very similar to an ordinary magnifying glass with rounded end and a handle but this one would have a ruler marks on the handle giving it another purpose