Short Sight and Long Sight Flashcards

1️⃣ Familiarise yourself with the flashcards:

  • Look through all the flashcards to see what's on both sides.
  • Make sure you understand the information on each card. If something's unclear, click the link to the revision notes at the bottom of the page for more details.

2️⃣ Test yourself:

  • Look at the question or prompt on each card and try to remember the answer before flipping it over.
  • Check the answer and make a note of any cards you find challenging and need to go over more.

3️⃣ Consistently Review and Practice:

  • Use spaced repetition: spend more time on the cards you struggle with and go over them more often.
  • Regularly review all the flashcards to help you better understand and retain the information over time.

Note: We may include questions that have multiple correct answers. It's useful to remember specific examples to understand these concepts better.

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What does it mean if a person is short-sighted?

They can see nearby objects clearly, but distant objects look blurry.

In a short-sighted eye, where is light from a distant object focused?

It is focused in front of the retina instead of on the retina.

Give one main cause of short sight in terms of the shape of the eye.

The eyeball is too long, so light focuses before it reaches the retina.

What type of lens is used in glasses to correct short sight?

A concave (diverging) lens is used to correct short sight.

How does a concave lens help a short-sighted person see distant objects clearly?

It spreads out light rays so they focus further back, onto the retina.

What does it mean if a person is long-sighted?

They can see distant objects clearly, but nearby objects look blurry.

In a long-sighted eye, where is light from a near object focused?

It is focused behind the retina instead of on the retina.

Give one main cause of long sight in terms of the shape of the eye.

The eyeball is too short, so light has not focused by the time it reaches the retina.

What type of lens is used in glasses to correct long sight, and how does it work?

A convex (converging) lens bends light rays together so they focus sooner, on the retina.

Why do many older people become long-sighted?

Their eye lens becomes less elastic, so it cannot become thick enough to focus on near objects.