Hyperopia, what is it?
Place your cursor on the picture
![Hyperopia or hypermetropia. When hyperopia distant objects are seen clearly, the near plan is badly discernible]()
Farsightedness (hyperopia) is a type of eye refraction when an image is focused not on a specific area of the retina but behind it. This is the reason for a blurred image that the retina perceives.
A reason for hyperopia
A reason for hyperopia may be a shortened eye bulb size or low refractive power of the optical system of the eye. Its increase will make the rays focus on the place where they are supposed to if the vision is normal.
Eyesight is getting poor with age, especially at a close distance, because eyes are losing the accommodation ability as a result of age-related changes in the crystalline lens – its elasticity is decreasing, the muscles that hold it are getting weaker – this all causes the vision to decrease. That is why almost everyone over the age of 40-50 is farsighted farsighted (hyperopic).
Types of myopia
Ophthalmologists distinguish several types of myopia:
- low — up to + 2.0 D
- medium — up to + 5.0 D
- high — over + 5.0 D
With low hyperopia, both distant and near vision are good, but the patients may complain of fatigue, headaches and dizziness. With medium hyperopia, people are able to see things clearly at a far distance but they experience problems focusing on the objects close at hand. With high hyperopia, the vision is poor at any distance as the eyes’ ability to focus the image on the retina is lost completely and the patients cannot clearly see even the objects located at a far distance.
Hyperopia and age-related farsightedness (presbyopia) can be revealed only if a special testing is carried out: when pupils are dilated with medicated eye drops, the crystalline lens is relaxed, and the genuine eye refraction may be seen.
Article rating:
4.7/5 (154 ratings)
Rate this article
Saving your rating...
Thanks for rating
|
Popular articles
|
More articles
|
Eye structure and functions
We don't see by eyes, we see through them. They transfer information through optic nerve, chiasm...
More details
Dry eye syndrome
Dry eyes are very frequent with computer users. They believe there are several reasons for this...
More details
The right way to arrange illumination
Proper arrangement of illumination is one of the requirements for correct vision operation. In low...
More details
|
Отправка заявки...