The 3D glasses on the left and right are designed to provide a stereoscopic viewing experience by separating the images intended for each eye. The left lens is polarized to filter out the right-eye image, while the right lens filters out the left-eye image. This separation allows the brain to perceive depth and create a 3D effect.

In modern 3D glasses, the left and right lenses are often made of plastic or polycarbonate and are coated with a special type of polarizing film. This film is designed to block light waves in a specific orientation, ensuring that each eye receives the correct image. The polarizing film is typically applied to the lenses using an adhesive or a lamination process.

The reason for having separate lenses for each eye is rooted in the way humans perceive depth. Our eyes are positioned slightly apart, and each eye captures a slightly different image of the same scene. The brain then combines these two images to create a 3D perception. By presenting each eye with a different image, 3D glasses mimic this natural process, allowing viewers to experience a sense of depth.

According to a study published in the Journal of Vision, the effectiveness of 3D glasses in enhancing the perception of depth is influenced by several factors, including the quality of the polarizing film and the distance between the viewer's eyes and the screen. High-quality polarizing films can significantly improve the clarity and depth of the 3D image, while a smaller distance between the viewer's eyes and the screen can enhance the overall 3D effect.

Additionally, the comfort and convenience of 3D glasses are crucial for a positive viewing experience. Modern 3D glasses are designed to be lightweight and comfortable to wear for extended periods. They often come with adjustable nose pieces and temple tips to accommodate different head sizes and shapes.

In conclusion, the 3D glasses on the left and right are essential for creating a stereoscopic viewing experience. They work by separating the images for each eye, allowing the brain to perceive depth. The quality of the polarizing film and the comfort of the glasses play a significant role in the effectiveness and enjoyment of 3D content.