I think that Jason K is right - as pre-optometry students, we really have to be prepared to answer these questions. It is not an attack on our choice to pursue a career in optometry, but merely seeing how realistic and prepared we are. So I guess I will take a stab at it too, as I hope to be interviewing soon.
1) 5 years after graduation: I have shadowed with an optometrist who was 4-5 years out of school, and while he was working, he mentioned he has not yet been able to buy his way into a practice, since that takes time and money. Coming from a lower-income family, I have worked multiple jobs most of my life, so I can relate and understand the necessity of doing as he had to do, and working at 2-3 different offices on a part-time basis. While many students would find this discouraging, as I think most of us dream we will walk right into a private practice from graduating, I am used to this lifestyle, and do not find it discouraging.
In 10 years after graduation: hopefully by this time, I will be getting into, or preparing to join a group practice of some variety. Perhaps one of the offices where I have been working part-time. At this time, I hope I still love optometry, and am as excited about it as I currently am. I understand there will always be difficulties in any field, especially any healthcare profession at the moment, but I think if you are willing to work hard to obtain what you want (even if you can't get it right away) and love what you do, that can be counted as happiness 🙂
2) As far as the challenges facing the field, as I mentioned above, finding a full-time employment position will probably get more difficult. However, I think that I have the patience to accept that these things take time. Of course, I understand many doctor's frustration at the fact that not only do you have living expenses, but also all sorts of debt from school to pay. To me, this means that perhaps I won't have the "doctor's lifestyle" that most people envision. But if I can accept that and enjoy my work, I think that is OK. To be honest, this is an area I need to research more, and if anyone else has any other thoughts about the future challenges we will face, I would love to hear about them.
Jason K, I really want to get into school and give a good interview - any suggestions or critiques you have for me would be much appreciated, whether positive or constructive criticism 🙂