Yes, the vitreous humor does refract light. The vitreous humor is a clear gel-like substance that fills the space between the lens and the retina in the eye. Its primary function is to provide support and maintain the shape of the eyeball. However, it also plays a role in vision by helping to transmit light to the retina, where images are processed.
The refractive index of the vitreous humor is close to that of the lens and the aqueous humor, enabling it to effectively bend and direct light properly towards the retina. Even though it is not the primary refractive medium in the eye—that role belongs to the cornea and the lens—the vitreous humor contributes to the overall optical clarity and image formation in the visual pathway.