Here are the various pictures I was talking about to show you those smaller doses. I think the last set, embedded in this post, shows nice clear examples.
There is this link to Steve Rapaport pictures of the various microdoses
http://steverapaport.com/jock/SyringeFineGradations/ The pictures are a little out of focus so I do not like them as much.
There are some good pictures here but still not the ones I want. This post also is good because it talks about the consistency of the dosing and has some different pictures.
http://felinediabetes.com/FDMB/viewtopic.php?f=10&t=34424#p360982
I know there are better pictures around. Let me find the link. Here they are!!! They were in the Lantus ISG, Tight Regulation Sticky called "STICKY: LANTUS & LEVEMIR - NEW TO THE GROUP? PLEASE READ..", about 6 pages down.
Pictorial guide using a U-100 syringe marked with half units:
Fine dose gradations from Steve and Jock:
0.5U = exactly half a unit
0.4U = skinny 0.5 touching the line
0.3U = skinny 0.5 with daylight under the line
0.2U = fat zero with daylight over the line
0.1U = fat zero touching the line
It is much easier to see those .25 and .5 u doses when you have the syringes with the 1/2 unit markings. If you do not, you can practice with an empty syringe and some colored water to check your dosing. Then maybe with a fine tipped black marker, draw in a line at the spot on your 'practice syringe/reference syringe' for future reference. Draw up an insulin dose and compare to the mark on your 'reference syringe'.
Does that make sense to you? Think you can do that smaller dose?
p.s. Be sure to check back in this thread. There have been several responses to you.