hi im a current student doing orthoptics at Liverpool. im in first year but I have a bit of knowledge on some of ur questions

Once you have finished ur degree, you will be a qualified orthoptist so that realistically is the job you will get after uni. There are job opportunities all around the globe for orthoptics, so you don't have to just stay in England.
as for job vacancies you do have to wait for a job to be available, like with any job. I've been speaking to a professional orthoptist whilst on placement and she said that when roles do appear it may not be near where you want as the job is very niche or when you first start applying there may only be part time roles. but once you have the job, youre in!
When you are a working orthoptist, there are opportunities to specialise in other roles (such as glaucoma specialist), go private, help with certain surgeries (such as botox surgery in the eye), do a manager role, and you can work your way up. However its unlikely you will be able to progress to be an opthalmologist as they are doctors, orthoptists are not doctors.
With working privately, I have met a few on placement that do, however they only work private a couple days of the week and the rest of the days with the NHS due to there not being as much demand for private, she also said that private roles are only common down south and not in the north due to money and population. You also have to be working for a certain amount of years to go private, I think it was 3/4 years.
I wouldn't worry about the job market part as roles are always appearing, it just might not be where you want it to be.
I hope this helps
