What is Diplopia?
Diplopia is also known as Double Vision. It occurs when an individual sees 2 or more images of the same object. Diplopia is different from the blurred vision where a single object appears to be unclear.
The vision in humans is single Binocular vision. This means that the images from both the Eyes are recorded and processed by the Nervous System but it makes a single image. An interruption in this process can make a double vision.
The double vision may be present in 1 Eye known as Monocular or 2 images can be made from both the Eyes together known as Binocular.
Diplopia can be a normal phenomenon, for example, when focusing on an object that that is close up, another object in the distance can appear double. This is known as Physiological Diplopia. It is generally not noticed because the Brain has the power to suppress these double images.