I did a bunch of research before purchasing an otoscope and decided upon this one based on all the good reviews. I'm not in the medical field, so I can't speak on this topic from a professional standpoint, but as a mother who just wants to have a preliminary look in my kiddo's ears before hauling her off to the doc for an ear infection, I was disappointed with this product. The light is not bright enough for me to see her eardrum clearly, despite the fact that she still has little ears. I know I was using it at the correct angle because I could mostly see in there, but it was too dark to tell if there were any issues.