Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332



Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem

Visual accommodation involves adjustment to the shape or position of the ___ .

  1. a. conjunctiva
  2. b. retina
  3. c. orbit
  4. d. lens

Summary Introduction

Introduction: The light that enters eye through pupil is passed through the lens. The lens focuses light and image on the retina. The lens is a transparent and flexible tissue that provides 25-30% of eye’s focusing power. The lens has ciliary muscles that undergo contraction and relaxation to change the shape of lens and its curvature.


Reason for the correct statement:

Visual accommodation is the process through which the eye changes focus from distant to nearby objects. It is done through action of ciliary muscles attached to the lens. They adjust the shape of the lens such that the light reflected from nearby or distant object focuses on retina.

Hence, option d. is correct.

Reasons for the incorrect statement:

Option a. is given as “conjunctiva”...

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