Here's my experience in the University of Toronto as a clinical fellow in vitreo-retina surgery.
We have 4 attendings, where you divide your time into three month blocks per attending. You get exposed to different styles, opinions. However, you still get a chance to scrub in with the attendings you rotated if you are on call with them.
Heavy surgical volume - minimum of 8 - 10 cases / week / fellow divided into 2 OR days. Cases range from simple vitrectomies for vitreous hemorrhage to macular holes, membranes, to complex PVR cases. Lots of buckles, primary vits, combined vit buckles, perfluorocarbon usage, silicone oil. Occasional pneumatic retinopexy. Attendings let you do some stuff at first, but you'll get to do a lot as the fellowship progresses. Scrubbed in over 500 cases in one year, majority (>60%) of which I was the primary.
Attendings almost always scrubs with you, guiding you all the way.
Heavy clinic volume - 60 - 80 cases / clinic day in the private clinic, and another 20 - 30 cases in the hospital clinic. You also do injections of IVK's during office hours. Average laser for the fellows per week would run from 15 - 20 cases, while some attednings would have 30-40 lasers scheduled in a day. (Usually, the fellow does 90% of the lasers) diabetics, vein occlusions, retinal breaks, extrafoveal CNVMs, vascular problems. Ample opportunities for PDT. You get to read 10 FAs per clinic day.
Call depends on how many fellows there are (We were 1 in 3, as there were 3 fellows). We have city wide on call for a week during holidays and summer. (REALLY BUSY). We usually keep our OR days for emergencies, and believe me, they get filled up really fast. We even have to book on our usual clinic days.
Excellent rapport with residents.
All in all, it is a well rounded clinical fellowship, very busy, with very nice attendings, but not much avenues for research. At first, when I was starting my fellowship, I thought maybe I could ask them if I could get to do it in 2 years instead of 1 year, after seeing the volume, I felt 1 year is enough. Asked one of the preceptors there, and he said he was willing to make me a clinical fellow for 2 years, as I think they liked my work ethics. One year in Toronto will really keep you busy.
In practice, I'm very comfortable doing any surgical case from the most simple to the most difficult cases, medical retina wise, I think I'm ok as I still read a lot. though I have to admit that exposure to research is almost none.