First off, they do this nifty thing called a cover test. This lets them see how your eyes work together. It's like watching a well-choreographed dance, but with your eyeballs! Then, there's a prism test. This one measures how far off your eyes might be straying from their usual path. It's like using a ruler, but for your vision! The ocular motility test checks for any hitches in the smooth move of your eyes. It's like a mini workout session for your eyes to spot any limitations! And of course, a neurological exam to check on those ever-important cranial nerves. If the mystery deepens, they might even call in the big guns – an MRI scan! This gives a crystal clear view of your brain and eye structures. It's like having a map to find the treasure a.k.a. the root cause of the double vision! At the end of the day, these tests are your best friends when it comes to solving the double vision puzzle. So, sit back and let your doctor do the detective work. Your eyes are in good hands!