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News » 3 effective strategies to understand the difference between myopia and presbyopia
3 effective strategies to understand the difference between myopia and presbyopia
Eyes and brain that work together in a coordinated way provide us with all the visual information, which go to make up our visual system.
In the case of myopia and presbyopia it happens that this normal and proper synergy suffer some dysfunctions: in the normal eye images are focused perfectly on the retina thus giving rise to an optimal viewing, but when the focus is not perfect, we are in presence of a defect of refraction.
This dysfunction declines, generally, in nearsightedness, farsightedness or astigmatism.
In the first case the focus of the images falls before the retina, in the second case goes to fall to the back of the retina and, finally, in the third case the focus of the images you go to "place" on two different planes. If for the specialist is easy to understand the difference between these three visual pathologies, some of us could have problems understanding the subject.
Here is some useful trick to understand the difference between myopia and presbyopia.
1. Check any tendency to squint
Myopia is the most common defect of sight in the world, Italy is affected much as a quarter of the entire population. Myopia comes from the greek word Myo (close), a term that indicates the shortsighted tendency to squint to see better from a distance here as the very meaning of the term in a nutshell conceal the Prince trick which use to sense the possible presence of the disease and distinguish it from hyperopia.
2. Attention to the defect in focus
In the myopic eye the rays fall in front of the retina and then diverge, forming a blurred image. In medical parlance this way of "work" is considered a refractive defect because of which you see blurred from a distance, while near vision can be good.
Useful clue to infer the presence of this pathology and steal the difference between myopia and presbyopia is to check the possible presence of difficulty in focusing, which may prove all the more improper and fallacious as more serious is the visual defect.
3. Do not underestimate headaches and eyestrain
Hyperopia is a visual defect that often no symptoms, in any case, it is easily seen with an eye examination. Hyperopic eye the light rays come to be focused beyond the retina, on the contrary of what happens in the eye so nearsighted.
Within certain limits the hyperopic eye, by accommodating, tends to reverse course this defect: such compensation is obviously limited to hyperopia medium-low level and degree of accommodation is greater in younger age, and decreases with age.
In subjects not so young that visual impairment can manifest in frequent headaches, eyestrain, especially during and after the reading: here are some symptoms to be reckoned with and not feel, for bias, due to fatigue and stress, as they can potentially arise from the subtle presence of hyperopia.
The opportunity to recognize a visual and, in the specific defect, to deduce the difference between myopia and presbyopia, is not made of little account: think, for example, it may be decisive with our children, which is difficult, especially if at an early age, they are able to express in words, a visual impairment.
In this case, the devices are represented, as you can imagine, more than ever, of great significance.