1. Near object vision technique: During near object vision the circular muscle of the ciliary body contracts and the suspensory ligament is stretched. It increases the curvature of the lens. The lens becomes thicker and shorter and the focal length decreases. Light rays from the object fall on the retina and an image is formed.
2. Techniques for viewing distant objects: During viewing of distant objects, the circular muscle of the ciliary body stretches and the suspensory ligament contracts. It reduces the curvature of the lens. The lens becomes narrower and longer and the focal length increases. Light rays from the object fall on the retina and an image is formed.