Different between short sighted and long sighted?

Short-sightedness, also known as myopia, is a common vision condition where close objects can be seen clearly, but distant objects appear blurry. This occurs when the eyeball is too long or the cornea is too curved, causing light to focus in front of the retina instead of directly on it.

Long-sightedness, also known as hyperopia, is a vision condition where distant objects can be seen more clearly than close objects. This occurs when the eyeball is too short or the cornea is too flat, causing light to focus behind the retina instead of directly on it.

In summary, short-sightedness affects the ability to see distant objects clearly, while long-sightedness affects the ability to see close objects clearly.

Short Sighted (Myopia)

- Difficulty seeing distant objects clearly
- Objects up close appear sharp
- Eyeball is elongated, causing light to focus in front of the retina
- Usually develops in childhood or early adulthood
- Can be corrected with concave lenses

Long Sighted (Hyperopia)

- Difficulty seeing near objects clearly
- Distant objects appear sharp
- Eyeball is shortened, causing light to focus behind the retina
- Can be present at birth or develop later in life
- Can be corrected with convex lenses

Comparison Table:

| Feature | Short Sighted | Long Sighted |
|---|---|---|
| Clear vision | Close objects | Distant objects |
| Eyeball shape | Elongated | Shortened |
| Focal point | In front of the retina | Behind the retina |
| Onset | Usually develops in childhood or early adulthood | Can be present at birth or develop later |
| Correction | Concave lenses | Convex lenses |