Class 10 Physics simulations · The Human Eye and the Colourful World

Defects of vision and their correction

See where a short-sighted or long-sighted eye focuses light, and the lens that corrects it.

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What to notice

A myopic eye focuses distant objects in front of the retina; a concave lens fixes it. A hypermetropic eye focuses near objects behind the retina; a convex lens fixes it.

Key relation

Myopia: P = −1 / far point (m); Hypermetropia: P = 1/0.25 − 1/near point (m)

Try this

Choose myopia with a far point of 2 m. What power of spectacles is needed?

What you can change

• Eye: choose Normal eye, Myopia (short-sight), Hypermetropia (long-sight)
• Far point (myopia): 0.5 to 5 m
• Near point (hypermetropia): 0.3 to 2 m
• Spectacles: choose Not worn, Corrective lens worn

More in The Human Eye and the Colourful World

• Dispersion through a prism
• Scattering of light: blue sky, red sunset
• Total internal reflection

See all Class 10 Physics simulations or every Physica simulation.