Understanding the Human Eye

This video tutorial covers the anatomy and functions of the human eye, focusing on parts like the iris, pupil, and eyelashes. It explains how the eye adjusts to different lighting conditions and the role of various parts in protection and color determination. The video also discusses common vision issues such as myopia and astigmatism, along with corrective measures. The tutorial concludes with a summary of key points.

Which part of the eye is responsible for controlling the size of the pupil?

• Lens

• Eyebrow

• Iris

• Retina

What happens to the pupil when exposed to bright light?

• It changes color

• It remains the same

• It shrinks

• It enlarges

Which part of the eye helps in keeping it moist?

• Tear Glands

• Lens

• Retina

• Pupil

In which lighting condition does the pupil enlarge?

• Bright

• Dim

• Flashing

• Dark

What determines the color of a person's eyes?

• Retina

• Pupil

• Iris

• Lens

What is the primary function of eyebrows?

• To focus light

• To change eye color

• To protect from sweat

• To enhance vision

When does the lens of the eye thicken?

• When viewing close objects

• In dark conditions

• In bright light

• When viewing distant objects

What type of lens is used to correct myopia?

• Cylindrical

• Bifocal

• Concave

• Convex

Which eye condition is characterized by blurred vision due to irregular curvature?

• Myopia

• Hypermetropia

• Astigmatism

• Presbyopia

What is the ability of the lens to change shape called?

• Refraction

• Accommodation

• Convergence

• Divergence