Understanding Accommodation and Common Eye Problems

The video discusses how the eye accommodates to focus on near and distant objects, detailing the roles of ciliary muscles and suspensory ligaments. It explains common vision problems like hyperopia and myopia, their causes, and corrective measures using lenses. Technological advancements such as contact lenses, laser eye surgery, and replacement lens surgery are also covered, highlighting their benefits and potential side effects.

What happens to the lens of the eye when focusing on a nearby object?

• The lens becomes thinner.

• The lens becomes thicker.

• The lens remains unchanged.

• The lens becomes opaque.

Which condition is characterized by difficulty seeing distant objects clearly?

• Presbyopia

• Myopia

• Astigmatism

• Hyperopia

What is a common cause of hyperopia?

• The eyeball is too long.

• The cornea is too curved.

• The eyeball is too short.

• The lens is too thick.

How does a concave lens help in correcting myopia?

• It diverges light rays before they enter the eye.

• It converges light rays before they enter the eye.

• It shortens the eyeball.

• It thickens the lens of the eye.

Which of the following is a potential side effect of replacement lens surgery?

• Increased eye pressure

• Cataracts

• Reduced eye infections

• Improved night vision