I try not to respond to questions about topics in which I have little or know knowledge -- and bioptic telescopes is one of these. However, I find the idea of a bioptic telescope to be very interesting and have looked at the description of this device on the Ocutech site. As a result, there is one consideration I want to offer you.
Let me begin by saying that my own approach to declining visual capability at this point in my life is a fairly expensive one that I may decide to modify in the future. But for now the solution is to employ three different pairs of glasses. The first is my "standard" pair for "normal things" and is a pair of bifocals. I'm happy with them EXCEPT when working outdoors in the NC summer when perspiration is an issue. But there are ways to help with that (e.g., sweat bands). I've tried three times in my life to wear contact lenses, like the vision they provide, but have never been able to stick with them in the long term because of a "dry eye" kind of problem. Glasses are just easier and less irritating for me. The bifocals are useless for reading music or working at the computer.
The second pair is my "close up" pair (which I'm wearing as I type this). I use it for all work at the computer and for reading music. It's designed to read things at a distance of about 24" (or a bit more or less) and is single vision -- not bifocal. When working at a desk, I often need to switch between pairs 1 and 2 since pair 2 is marginally useful for reading, especially for any length of time.
The third pair is my "athletic" pair. Single vision, but for distance. This is primarily for playing tennis since I discovered that wearing bifocals for tennis is really not a good idea .
Why not trifocal or graduated lenses? Two reasons. First, I've always been concerned about the image quality from my glasses, and I don't think those more complex lenses provide what I'm looking for. Second, using lenses of that sort requires SOME degree of head adjustment in order to bring the correct portion of the lens into play. While I think this might be fine for normal uses during one's day, doing this while playing music (I believe) would be either irritating or quite difficult or uncomfortable. So I've always shied away from these. I may change my mind about this in the future, but it would require a significant trial. I'm also skeptical that they would work well for sports and other outdoor activities.
This brings me to the concern I would have with a bioptic telescope. Consider,
'By attaching the telescope to the eyeglasses, the wearer can switch their sight between their "regular vision" and the magnified vision through the telescope by just a slight downward tilt of the head. It is fast and convenient to do.'
Perhaps fast and convenient to do for most needs during a normal day. And perhaps even for driving. But for playing music (which requires a coordination of your head position, instrument position, and embouchure)? Color me skeptical. You may be able to adjust to it, but it may require some real discipline. And you might discover that playing with the help of a stand rather than just holding the instrument would make things easier. But I think this is a concern that should be raised with your optometrist, opthalmologist, or provider. I'd try to work a deal where I could try the bioptic telescope and return it (for at least a partial refund) if it didn't work out. Normally you would have to pay the diagnostic, prescription, and fitting fees in any event. But you might be able to get an agreement on returning the device itself (my wife is looking at just such an agreement for a particularly unusual set of contact lenses).
Also, ...
" ... three to five feet. This about the distance most tuba-euph players need to set the music stand to clear the instrument."
This certainly is not true for me. My music on the stand is typically about 2' 4" from my eyes. With my "close vision" glasses, I can have it a bit further away; and I can get quite a bit closer if necessary. But 3' is significantly further than I have ever set a stand, and 5' is totally out of the park. I've never had a "clearance" problem with any instrument (among a flute, saxophone, trombone, euphonium, or tuba).