Farsightedness or Hyperopia

What is farsightedness?

Farsightedness is also known as hyperopia. It is a refractive error in which distant objects are clearly seen, but close objects appear blurry. People experience farsightedness differently, and some people, more commonly when they are young, do not notice any problems with their vision. In addition, for people with significant farsightedness, vision can by blurry for objects at any distance, near or far.

defferent with Myopia People who are farsighted see far-away objects better than those that are close. If you are farsighted, you may have trouble with up-close tasks like reading or sewing.

Farsightedness occurs because your eye is too short and does not bend light correctly. Light entering the eye is focused behind the retina instead of directly on the retina.


Mild farsightedness may not need treatment in children and young adults. Their eyes can usually adjust to make up for the problem. But as you age, your eyes cannot adjust as well. You may not notice that you are farsighted until around age 40, when you will need eyeglasses or contact lenses.

Glasses or contact lenses can also help if your farsightedness is more than a mild problem. Surgery may be an option in some cases.

hyperopia


What causes farsightedness?

The eye relies on two critical parts to focus on an image: the cornea, which is the clear front surface of the eye, and the crystalline lens, a clear structure inside the eye that changes shape in order to focus on objects.

In an eye without refractive error, these focusing elements have a smooth curvature, much like the surface of a smooth rubber ball, and bends incoming light to make a sharply focused image on the retina. If the cornea is not smoothly curved, like in the case of people with farsightedness, the light does not properly bend, or refract light properly, and this results in a refractive error. Farsightedness occurs when light entering into the eye focuses behind or beyond the retina, instead of on it.

Both children and adults can be affected by farsightedness and it can even be hereditary. People whose parents are farsighted may likely to also have the condition. An eye care professional (ECP) can diagnose farsightedness during a routine eye exam. Generally, at-school vision screenings are not effective in detecting farsightedness.

What are symptoms of farsightedness?

Symptoms include:
  • Blurred vision at night or later in the day
  • Trouble focusing on near objects
  • Aching eyes, eyestrain and headaches
  • Squinting
  • Difficulty maintaining a clear focus
  • Eye fatigue
  • Irritability or nervousness after sustained concentration
How is it corrected? 

Farsightedness can be corrected with eye glasses, contact lenses or refractive surgery. Patients should discuss all options with their ECP to determine what’s most appropriate based on their eyes and lifestyle.


by: Ratsya