I started by drawing 2 circles from the origin with diameters 47mm and 55 mm, then i decided to draw between these 2-circles the Deathly Hallows symbol.

I faced a problem to draw and define the triangle with a circle inside it and a line both of them, so i decided to make every shape separately.

After drawing and defining each shape, i started making a circular pattern, and i repeated 12 times to be like a clock when looking at it.

Then i started measuring the distance of the bridge(17mm), drawing a line in the middle in order to help me acting like the axis of symmetry when making Mirror.

Then, i started to draw the bridge using three point arc slot between the 2-glasses.

I decided to make the hole of M3 Screw inside the frame itself so i edited the two circles in the middle to be (3.2mm), and these 2mm are tolerance for the kerf error made by the machine.

I made offset to the outer glasses frame and the inner circles of the lens by (0.5mm) just to create outer line that will be cut and the inner line to be speed cut.

Then i extruded the glasses 3mm to visualize its final result, and also in order to help me remove the useless constraints that i need to trim but i cannot.

Finally, i made a project on the sketch itself to projectile the outline needed and neglect the non needed ones.

Save as .dxf, open LaserWorks and import the file.

After finishing the previous design, i challenged myself to try what i couldn't do, which is to  define the triangle with a circle inside it and a line both of them.

I started by drawing 2 circles from the origin with diameters 47mm and 55 mm, then i decided to draw between these 2-circles the Deathly Hallows symbol.

After many trials i did it and they are defined.

I started making a circular pattern, and i repeated 12 times to be like a clock when looking at it.

Then i started measuring the distance of the bridge(17mm), drawing a line in the middle in order to help me acting like the axis of symmetry when making Mirror.

Then, i started to draw the bridge using three point arc slot between the 2-glasses.

I faced a lot of problems trying to extrude this design, but after many trials its finally extruded(3mm).

I added a new sketch on the face of the glasses, in order to write a text on the bridge (Hogwarts).

I made a project on the sketch to select the needed outlines for laser cutting and neglect the rest.

Finally i saved the sketch as dxf.

When i  went to LaserWorks to prepare the file for cutting, the surprise was that not all the triangles wanted to be selected, i tried to gest back to Fusion and edit a lot to overcome this issue but I didn't know where is the issue, so Unfortunately i went back to the previous design.

I started by sketching the arm of the glasses on the perpendicular plane of the frame.

The dimension of my arm will be 140mm.

I started by drawing a construction line with 140mm length to be a reference.

I drew a line with length 92mm and another line parallel to it with length 90 mm and distance between them 4mm.

From the end of each of the pervious lines, i started to make another shorted lines with angle, taking into consideration the reference line. 

I drew a line connecting the previous 2-lines together.

I drew a small rectangle (4*2mm) in order to be the short part for the screw.

I start extruding the short part of screw by 2mm on the its perpendicular plane. then i drew a circle on it and extrude cut the circle to make the hole.

Then, I extruded the main arm and make Fillet to its sides in order to make it more smooth, then i used Mirror tool to create the other side.

I combined the body parts of each arm in one body and save each arm as .stl to prepare it on cura.

Open cura, import the .stl file.

Set the infill to 20%, the resolution 0.15, temperature 215.

In my design it didn't require support, but i turned on the Adhesion to make sure it will be accurate.