Defects of the Human Eye

The diagram shows one of the common vision defect in human eyes. Name the defect.

• Long-sightedness

• Short-sightedness

Short sightedness is caused by ..... (Please choose 2 correct answers)

• Eye lens too thick

• Eye lens too thin

• Eye ball too short

• Eye ball too long

People with short- sightedness will see ..... (Please choose 2 correct answers)

• near object clearly.

• near object blurry.

• distant object blurry.

• distant object clearly.

Which vision defect is related to the diagram?

• Short-sightedness

• Long-sightnedness

• Astigmatism

• Normal vision

• Blind vision

One of the common vision defect in human eyes is long-sightedness. This is because the image is formed ........ the retina.

• behind

• in front of

• on the retina

Long sightedness is caused by ..... (Please choose 2 correct answers)

• Eye lens too thick

• Eye lens too thin

• Eye ball too short

• Eye ball too long

People with long- sightedness will see ..... (Please choose 2 correct answers)

• near object clearly.

• near object blurry.

• distant object blurry.

• distant object clearly.

This eye defect can be corrected with which type of lense?

• 
• 

This is the view of a person with

• Short-sightedness

• Long-sightedness

• Astigmatism

• Normal vision

• Blind vision

A person has vision defect and corrected by cylindrical lens. Which of the following causes him to have such vision defect?

• Eyeball is too long

• Eye lens is too thin

• Uneven curvature of the cornea

• All of the above