For performing a disk quality scan do the following;
Each test along the Left hand size is an independent test (i.e. Transfer Rate, Create Test disc, Verify Test disc, Drive info, Disc info, Drive Quality, etc.  It DOES NOT fill in data for all of them, only for the one that is selected.  A couple of them fill in the information automatically, like the Drive Info or Disc Info if there is a disc in the drive, etc.
From reading above it appears that you had the default, Transfer rate selected.  That is why you did not see any info under Disc Quality when you moved down through the selections.
You MUST select what type of test you want to run and it will only fill in the data for that test.  You can not then move to the other tests and see any data, other than the few that automatically read the data like Drive Info and Disc Info, unless you run it with that particular test selected.
Launch the Opti Drive Control Program;
1.  At the top left, under the menus, where it says 'Drive'...make sure the Blu-Ray Burner you are going to use for scanning is selected.  Use the drop down if it is not.
2.  On the left side of the screen, about half way down, select Disc Quality.  The screen should change, now saying Quality near the top, left and split into 2 graphs, one on top and one on bottom.
3.  On the lower right side of the screen, where it says Speed, select the drop down arrow and select either 4x or 8x.  I generally scan mine at 4x unless I am in a hurry, then I use 8x.
4.  Insert your disc in the drive that you selected at the top.  Give it a minute to read the disc and the lines near the top left that say 'Type, MID, Length, and Contents' should fill in with some information about the disc.
5.  If its a DVD, You can click the little disc symbol next to the box where it says 'Label' and it will fill in.  For Blu-Rays it will not.
6.  Near the bottom of the screen, slightly left of center, there is a box that says 'Jitter'.  Deselect it (Make sure there IS NOT a check mark in it.  IT can cause problems sometimes.
7.  Now near the bottom right, select the button that says 'Start Full'.
The quality scan should start.  At 4x it WILL take a little while, but you will get a slightly better quality scan than at 8x.  You should start seeing many vertical lines appearing in the top graph and maybe a few every now and then in the lower graph.
For a Blu-Ray, the lines in the top graph are the LDC errors, for DVD's they will be PIE errors, which are correctable errors.  You will see many, many all the way across the disc.  Hopefully they are not too high/tall.
In the lower graph, For Blu-Rays you will see the BIS errors, for DVD's they are the PIF errors, which are the uncorrectable errors.  Hopefully not too many and not very tall.
The lines are generally green for the errors that are acceptable, if they get taller, they will turn yellow, and if they are very tall, they will turn RED.  Anything in Yellow or Red is unacceptable and may be noticeable when viewing the movie in the form of a stutter, pixilated spot, lower quality, fuzziness, etc. only for a moment, but they indicate poorer quality burn for that particular sector/spot in the disc.
In the lower portion of the screen, under the graphs where it says 'Avg, Max, and Total', you will see incrementing numbers.  These are the actual values it calculates.  What you are really concerned about are the Max numbers, especially the BIS for Blu-Rays and PIF for DVD's.  THE LOWER THE BETTER.
You will see the vertical lines filling in from left to right on the graph.  It will continue until it reaches the large RED vertical line on both graphs, which is the end of the data on the disc.  The more data on the disc, the further to the right the Red line will be.
You will also see a progress bar at the bottom with a percentage value indicating how much of the disc has been scanned at any point in time, giving you an idea of how much is left to scan.
You may end up having to adjust the graphs a little to really see the vertical lines well.  Just let me know how it goes and we can make some other minor adjustments, if needed.  The graphs will auto resize depending on the height of the vertical lines, which can make it hard to see them sometimes if there are a few REALLY tall lines in the graphs.
This should get you started.  I am sure you will have many more questions and that's OK.  Just wanted to give you enough info to get started.