When you are a resident, make it a point of learning as much as possible. Do a wide variety of cases and learn from professors in all subspecialties of ophthalmology. This means learning to perform MIGS (minimally invasive glaucoma surgery) with cataract surgery even if you plan on specializing in strabismus or orbital surgery. This young resident is performing all different types of MIGS procedures from all the different manufacturers including the iStent and the Hydrus, as shown in this video. These are not difficult procedures as long as you understand the proper head position and microscope tilt required.
Watch this video to see how this resident performs both the iStent and the Hydrus (on two separate patients).