What is the primary characteristic of the lens in the eye?

The primary characteristic of the lens in the eye is that it is transparent, allowing light to pass through, which is vital for focusing images onto the retina. The lens plays a crucial role in the visual process by adjusting its shape—this flexibility, known as accommodation, enables the eye to focus on objects at various distances, contributing to clear vision. Its location is behind the iris and pupil, not in front, which is important for maintaining the proper pathway for light entering the eye. This transparency is essential for the lens to perform its function effectively, enabling clear sight by refracting light onto the retina, where visual signals are processed by the brain.