The Sony 55W900A television model utilizes active 3D technology, which requires specific 3D glasses for optimal viewing experience. These glasses are designed to synchronize with the television's 3D signal, ensuring a seamless and immersive 3D experience. The recommended 3D glasses for the Sony 55W900A are the Sony TDG-BT500 series. These glasses are compatible with the television's 3D capabilities and provide a comfortable viewing experience.

The reason for using the Sony TDG-BT500 series is due to their compatibility with the Sony 55W900A's active 3D technology. Active 3D glasses use a battery-powered shutter system that alternately blocks the left and right eyes' views of the screen, creating the illusion of depth. The Sony TDG-BT500 series is designed to work specifically with Sony's active 3D televisions, ensuring a stable and high-quality 3D image.

According to a report by Sony, the TDG-BT500 series glasses offer a wide viewing angle and a comfortable fit, which is crucial for an enjoyable 3D experience. The report also states that these glasses have a battery life of approximately 30 hours, which is sufficient for extended viewing sessions. Additionally, the glasses are lightweight and have a durable design, making them suitable for both home and portable use.

In conclusion, the Sony TDG-BT500 series 3D glasses are the recommended choice for the Sony 55W900A model due to their compatibility, comfort, and battery life. These glasses ensure that viewers can fully enjoy the 3D capabilities of the television without any interruptions or discomfort.