Myopia vs Hypermetropia — Difference (with Table & FAQs)
Myopia vs Hypermetropia compared side by side — a 6-row comparison table, 4 key points and 3 exam FAQs. Class 10 Physics, free and no sign-up.
TL;DR: Myopia vs Hypermetropia compared side by side — a 6-row comparison table, 4 key points and 3 exam FAQs. Class 10 Physics, free and no sign-up.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
The main difference between Myopia and Hypermetropia: Myopia is nearsightedness where close objects are seen clearly but distant objects appear blurred. Hypermetropia is farsightedness where distant objects ar
Myopia vs Hypermetropia — Comparison Table
| Basis | Myopia | Hypermetropia |
|---|---|---|
| Vision Clarity | Close objects clear, distant objects blurred | Distant objects clear, close objects blurred |
| Image Formation | Image forms in front of retina | Image forms behind retina |
| Cause | Cornea too curved or eyeball too long | Cornea too flat or eyeball too short |
| Correction Lens | Concave lens (negative power) | Convex lens (positive power) |
| Near Point | Closer than normal (less than 25 cm) | Farther than normal (more than 25 cm) |
| Far Point | Closer than infinity | At infinity or appears normal |
Key Points
- Myopia and hypermetropia are refractive errors of the eye
- Myopia is corrected with concave (minus) lenses
- Hypermetropia is corrected with convex (plus) lenses
- Both conditions affect the focusing of light on the retina
Frequently Asked Questions
What is the difference between myopia and hypermetropia?
In myopia, or short-sightedness, distant objects appear blurred because the image forms in front of the retina. In hypermetropia, or long-sightedness, nearby objects appear blurred because the image forms behind the retina.
Which lens corrects each defect?
Myopia is corrected with a concave lens, which diverges the rays so the image moves back on to the retina. Hypermetropia is corrected with a convex lens, which converges the rays so the image moves forward on to the retina.
What causes these defects?
Myopia arises when the eyeball is too long or the lens is too strongly curved. Hypermetropia arises when the eyeball is too short or the lens cannot converge light enough. Both change where the image forms relative to the retina.