Neuroguy, I am not sure where you are in the training process, but IMHO, while all of this is certainly theoretically possible, you will not at the end of the day be a surgical retina guy and high volume refractive guy, it's just not how it works out there. Looking through your posts it seems like you maybe undecided on medical speciality so far? If that's the case, don't worry, ophtho is an outstanding field and you will find your primary interest and direction once you get to residency. If you are really torn and want a little bit of it all, you will do comprehensive and you can do refractive without fellowship even, If you want retina and cataracts/refractive stuff then you will do medical retina fellowship + comp, if you want surgical retina then you will just do surgical retina (which is like 80% medical retina anyway, so you get your fill of the clinical component), if you want heavy refractive you will do a refractive/cornea/anterior segment fellowship and see comp as well. You'll figure it out and you will be happy with your choice, busy enough, and not feel like you are missing out. Just trust us on this one. People do multiple fellowships out there, but it's things that flow together naturally, and retina and refractive is just not a winning combination.