List three common causes of eye injuries in daily life and suggest one preventive measure for each cause.
Answer
1. Flying particles (e.g., dust, sand) – wear safety goggles or spectacles. 2. Chemical splashes (e.g., acids, cleaning agents) – use protective face shields and rinse eyes immediately with water. 3. Impact injuries (e.g., sports balls, tools) – wear appropriate protective eyewear such as sports glasses or helmets with visors.
Step-by-step solution
- Identify a frequent source of eye injury: flying particles like dust or sand.
- Suggest a specific preventive measure: wearing safety goggles or wrap‑around spectacles.
- Identify a second source: accidental chemical splashes from acids or cleaning agents.
- Recommend a preventive action: using face shields and immediate eye‑wash with clean water.
- Identify a third source: impact injuries during sports or while using tools.
- Propose a preventive device: protective sports glasses or helmets with visors.
Common mistake: Giving generic advice such as "be careful" without linking a specific protective measure to each cause.
Concept tested: Eye protection
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Related questions
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- 2 Which part of the eye contributes the greatest refractive power?
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- 4 Describe what happens to the ciliary muscle, suspensory ligaments and the shape of the lens when the eye focuses on a near object.
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- 6 A hyperopic person can see distant objects clearly but cannot read a newspaper held at 25 cm without glasses. The far point of his eye is at infinity. Calculate the minimum power (in dioptres) of a thin converging lens that should be placed close to the eye to enable him to read at 25 cm.