Q.Describe the process of accommodation of the human eye, and define the near point and the far point of a normal (unaided) human eye.
You're viewing a preview — the full solution, concept, methods & PYQ mapping are locked.
Start your 14-day free trial to unlock the full solution →To view a distant object, the ciliary muscles relax, letting the elastic eye lens flatten to its longest-focal-length, least-curved shape; to view a nearer object, the ciliary muscles contract, letting the lens bulge to a shorter-focal-length, more strongly curved shape, increasing its converging power just enough to keep bringing the image to a focus on the fixed retina as the object moves closer. This whole adjusting process is called accommodation. It has a limited range: the far point is the greatest distance at which a fully relaxed eye can still focus sharply — infinity, for a normal eye; the near point (or least distance of distinct vision) is the smallest distance at which the eye, with its ciliary muscles at maximum contraction, can still focus sharply — conventionally for a nor …
Unlock everything free for 14 days
- Full step-by-step solutions
- Concept-first explanations
- Methods, shortcuts & mistakes
- PYQ mapping + timed mock tests
Full access for 14 days. No credit card required.