Eye - light-sensitive organ that is able to distinguish variations in shape, colour, brightness and distance.
Refraction - bending of light as it passes from one medium to another
Orbit - eye socket
Focal length - is the distance between the middle of the lens and the point of focus on the retina
Antagonistic - when one set contracts the other relaxes
Dilates - enlarges
Radially - from pupil to outer edge
Refraction - bending of light as it passes from one medium to another
Orbit - eye socket
Focal length - is the distance between the middle of the lens and the point of focus on the retina
Antagonistic - when one set contracts the other relaxes
Dilates - enlarges
Radially - from pupil to outer edge