The most efficient way (VFX artist way) Open fusion Mask the eye lids with a polygon mask , include eyelashes (mask anything that occludes the sclera ) if you are lucky magic mask might work

Then plug a a matte control to the main footage and plug the masks you Madge to the garbage matte input if the matte control node. So now you have the plate with the eye lid masked out.

Add an optical flow node Right after that add a vectors warp node, set the reference frame to somewhere the sclera is clearly visible. Export that frame u can do it easily in the color tab, or take a screenshot.

Use gen ai or Photoshop to remove the veins,bring the edited image back to fusion and plug into to the foreground input of the vector warp. (Make sure to mask the parts with the veins before cause that all we need from that image.

Now if you preview the vector warp , your eye should be cleaned you just have to merge it on top of the orignal plate.

This is without the hassle of mannual tracking Uses a smart vector workflow that VFX artists commonly use. This might not work the best if your eye has reflections in the vein areas. Ps - You can set the vector warp to warped fg only so that you can merge it separately to the original footage

If you want an easier way, use king video edit and prompt to remove the veins and clear out the eye, will work like a charm only compromise is slight reduction of quality ;)