By adding coatings to the glass, the amount of light reflected can be decreased. All binoculars have some type of coatings. As a rule of thumb, the better the coatings, the more expensive the binoculars. Over time these coatings will wear off and limit what you can see. As you move up the price range the binoculars will have multicoatings then become fully coated and finally fully multicoated.
Coated optics give off a green or reddish hue when looked at from a distance.
The last thing I want to mention about binoculars has to do with their construction. In order for binoculars to give a stereo upright view they have to bend the light. This is done through the use of prisms. Most binoculars use porro prisms to accomplish this. The porro prisms are what give the binoculars that fat look.