The ability of the lens to bend light rays so they focus on the retina is called:

• A. Convergence
• B. Refraction
• C. Visual acuity
• D. Capillary hemangioma

Answer: (B)

Refraction is the bending of light as it passes between media with different densities. In the eye, this bending by the cornea and lens redirects light rays to converge onto the retina, producing a focused image. The lens also adjusts its shape to fine-tune this focus for near or far objects, a process called accommodation. Convergence describes the rays coming to a common point, which is the result of focusing, not the bending action itself. Visual acuity refers to how clearly that image is seen, influenced by focusing but not the bending mechanism, and capillary hemangioma is unrelated to how the eye concentrates light.