GCSE Biology - How the Eye Works (Part 2) - Accommodation #32

The video explains the process of accommodation in the eye, focusing on how the cornea and lens work together to refract light onto the retina. It details the roles of the ciliary muscles and suspensory ligaments in adjusting the lens shape for focusing on near and distant objects. The video also covers common vision problems like long sightedness and short sightedness, explaining how glasses with convex or concave lenses can correct these issues.

What is the primary role of the cornea in the process of accommodation?

• To always refract light by the same amount

• To refract light by a variable amount

• To focus light on the iris

• To change the shape of the lens

How does the lens adjust when focusing on a nearby object?

• It becomes less curved

• It becomes longer and thinner

• It becomes shorter and fatter

• It remains unchanged

What happens to the suspensory ligaments when the ciliary muscle contracts?

• They become taut

• They slacken

• They relax

• They contract

What type of lens is used to correct long-sightedness?

• Cylindrical lens

• Concave lens

• Convex lens

• Flat lens

In short-sightedness, where does the light focus relative to the retina?

• Directly on the retina

• In front of the retina

• Behind the retina

• On the cornea

What is the medical term for long-sightedness?

• Hyperopia

• Presbyopia

• Astigmatism

• Myopia

What is the medical term for short-sightedness?

• Presbyopia

• Astigmatism

• Myopia

• Hyperopia