One more note, keeler may fit comfortably next to your eye socket because of the rounded top, but they have a weird lens battery, the lens go up and down 9 diopters, to get to 10 and 20 you have to click in a second lens of +/-10 or 20 lens and then click in the +/- 1 to 9 lenses. I haven't had to go to those extreme diopters, but Heine's is so much more convenient, all in one lens battery going from -36 diopter to +38 diopters. I like the build and the handle better on the Heine vs Keeler. Ultimately, you'll get used to whatever you get so it doesn't matter too much. However, I like my Heine and I would recommend it. You should get it with the Retinoscope and Transiluminator, the entire package with 2 rechargable handles are a great deal for students. Also the desk charger comes with adapters that have prongs that will fit in power outlets in other countries, convenient if you're looking to do mission work overseas. My heine kit also came with an adapter that allows me to plug the handle directly into an outlet for charging away from my desk, but I haven't had to recharge my unit that way yet.
