Question

What is short-sightedness?

Answer 1

Some people cannot see nearby objects clearly, This is due to the defects in the retina of the eye. People with hypermetropia can have far-sightedness or long-sightedness. Blurry images when perceived due to the light rays do not focus on the surface of the retina but behind it. Hypermetropia is not an eye disease, it is an eye defect. It can be corrected. It will be corrected by using corrective eyeglasses or contact lenses or refractive surgery. Convex lenses can correct this problem. The lens is convenient for everyone. Lasik surgery is an example of refractive surgery.

Complete answer:
Short-sightedness, or myopia, is a common eye in which close objects can be seen clearly and distant objects appear to be blurred. Symptoms of short-sightedness are
1. Sitting near to the television
2. Headaches
3. Need to sit in front rows in schools to read to boards.
When the eyes grow slightly occurs with Short-sightedness. Light doesn't focus on the retina at the back of the eye. Light rays focus in front of the retina. This is due to the genes, spending low time in outdoor games, high work in close.
Wearing a lens will result in the light will focus onto the back of the retina. It leads to distant objects that will not be seen as blurry. Some people use bifocal lenses which allow them to see both close-up and far away objects. Lenses used to treat myopia are called "minus power lenses". The power of lenses measured in units is called diopters. Concave lenses are used to correct myopia.
In the UK one of two people had Short-sightedness. This defect affects people from the age of six to thirteen.

Note: There are different types of eye defects:
1. Eyes point in different directions in childhood.
2. Pressure increases in the eyes are called Glaucoma.
3. The vision of one eye doesn’t grow properly leads to a lazy eye.
4. Inside the lens of the eye cloudy patches developed is known as Cataract.
5. Presbyopia is the loss of the eyes' ability to focus on nearby objects only. It is due to aging. It comes in the midst of forty.