Also knows as short-sightedness – a common vision problem experienced by many.
Short-sighted people have difficulty seeing distant objects, but can see objects that are near clearly. They often experience headaches, eyestrain, squinting, or fatigue when driving, playing sports, or looking more than a few feet away.
A refractive error resulting from the eyeball being too long, or the cornea having too much curvature causes this – light rays entering the eye aren’t focused correctly.
Short-sightedness can easily be diagnosed using a standard eye exam, and it can be corrected with spectacles, contact lenses, or surgery.
Hyperopia, or long-sightedness, is also a common vision problem.
Those who are long-sightedness can see distant objects very well, but have difficulty focusing on close-up objects. They sometimes have headaches, or eyestrain, and may squint or feel fatigued when performing work at close range.
This vision problem occurs when light rays entering the eye focus behind the retina, instead of directly on it. The eyeball of a farsighted person is shorter than normal.
Long-sightedness can be corrected with spectacles or contact lenses to change the way light rays bend into the eyes.
Like short-sightedness and long-sightedness, astigmatism is a refractive error – it’s a problem with how the eye focuses to light.
Instead of a single focus of light entering the eye, multiple focus points occur, either in front of or behind the retina (or both).
Usually caused by an irregular cornea, astigmatism causes a blur at all distances. Symptoms include eyestrain, squinting, and headaches, especially after reading or other prolonged visual tasks.
Astigmatism is diagnosed with a routine eye examination – a small amount is common and does not need correction. However, in cases where the problem is severer, spectacles and contact lenses are used to correct the vision. Depending on the amount of astigmatisim it can also be corrected with refractive surgery.
Presbyopia is an age-related process, and usually becomes noticeable in the early to mid-fourties. It’s not a disease, and it can’t be prevented.
The eye’s lens stiffens with age, and it has a harder time focusing up close. Some signs include holding books, magazines, newspapers, and other reading materials at arm’s length to focus properly.
Because Presbyopia can complicate other common vision conditions, we suggest a comprehensive eye examination. This will help determine what reading spectacles, bifocals, trifocals, varifocals, or contact lenses are required to correct the problem and help you see better.
For more eye conditions information, visit the eye care trust webpage, which provides a comprehensive A-Z list of conditions.