The Human Eye and Lenses Quiz

Function of the Lens in the Human Eye

• The lens in the human eye changes shape to focus on objects at different distances, allowing us to see clearly.
• The lens becomes thicker to focus on close objects and thinner to focus on distant objects.

Function of the Lens System in the Human Eye

• The lens system, consisting of the lens and the cornea, refracts light and focuses it onto the retina.
• This allows us to form a clear image of the world around us.

Significance of the Human Eye

• The human eye is considered the most significant sense organ because it provides us with the sense of sight, allowing us to perceive and interpret the world around us.

Function of the Cornea in the Human Eye

• The cornea, the transparent outer layer of the eye, helps to refract light and focus it onto the retina.
• The cornea provides approximately 70% of the eye's total focusing power.

Similarities between the Human Eye and a Camera

• Like a camera, the human eye has a lens system that focuses light onto a light-sensitive surface (the retina in the eye, the film or sensor in a camera).
• Both the eye and a camera have an aperture (the pupil in the eye, the aperture in a camera) that controls the amount of light that enters the system.

Test your knowledge about the function of lenses in the human eye and how they correct defects of vision. This quiz explores the relationship between the refraction of light by lenses and its application to the study of the human eye.