An ophthalmoscope is a special tool that helps doctors look at the inside of your eyes. It's like a tiny flashlight that shines light into your eyes so the doctor can see what's going on.
The ophthalmoscope has a little lens that magnifies, or makes things look bigger, so the doctor can see all the parts of your eye. The doctor might have to get close to your eyes and ask you to look in different directions so they can get a good look at everything.
This tool can help the doctor check if your eyes are healthy and working the way they should. They can see if your eyes have any problems or if you need glasses to see better. It's just like how a mechanic uses special tools to check if a car is working properly.