What is the primary function of anti-reflective coatings on lenses?

The primary function of anti-reflective coatings on lenses is to improve light transmission through the lens. These coatings reduce the amount of light that reflects off the lens surfaces, allowing more light to pass through. This results in enhanced visual clarity and comfort, as it minimizes glare and improves the quality of the image seen by the wearer. By allowing more light to enter the eye, anti-reflective coatings help in low-light conditions and can also enhance the appearance of lenses, making them nearly invisible to others and reducing distraction from reflections.

The other options do not accurately describe the primary function of anti-reflective coatings. Strengthening the lens material and preventing scratches relate more to lens durability and protection but do not pertain directly to how light interacts with the lens. Changing the color of the lenses is more relevant to tinted lenses or specific lens options, rather than the functional benefits provided by anti-reflective coatings.