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Figure 4 shows a picture seen through healthy eyes and the same picture seen through eyes affected by cataracts - Edexcel - GCSE Biology - Question 4 - 2018 - Paper 1

Question 4

Figure 4 shows a picture seen through healthy eyes and the same picture seen through eyes affected by cataracts. a) (i) In which part of the eye do cataracts form? ... show full transcript

Worked Solution & Example Answer:Figure 4 shows a picture seen through healthy eyes and the same picture seen through eyes affected by cataracts - Edexcel - GCSE Biology - Question 4 - 2018 - Paper 1

Step 1

In which part of the eye do cataracts form?

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Answer

Cataracts primarily form in the lens of the eye. The lens is responsible for focusing light onto the retina, and when it becomes cloudy due to cataracts, it obstructs clear vision.

Step 2

Explain why the picture seen through eyes with cataracts is less clear.

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Answer

The picture seen through eyes with cataracts is less clear due to the clouding of the lens. This cloudiness scatters light and prevents it from properly focusing on the retina, resulting in a blurry or dim image. Additionally, cataracts can lead to increased glare and difficulty in seeing contrasts, further reducing visual clarity.

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