What symptoms are characteristic of myopia?
In myopia the most relevant symptom is poor vision from afar. This circumstance, in addition, influences the psychological perspective of the individual who can develop a more withdrawn character and focused on activities in his immediate environment. Discomfort and eyestrain may also appear. At night, the symptoms get worse due to several factors:
• Pupillary dilation.
• Refraction in the peripheral area of the lens is more myopic.
• Wavelengths close to blue are more refracted.
• In myopia magna, the function of photoreceptors is altered.
Is farsightedness and astigmatism hereditary?
The hereditary character of farsightedness and astigmatism has been demonstrated by numerous investigations in families.
What are the signs manifested by people suffering from myopia and farsightedness?
Eyes with simple myopia have a completely normal appearance. In high myopia, the eyes tend to be large and prominent.
The hypermetropic eye is typically small, its anteroposterior axis is usually shorter, the cornea small and the curve of the sclera more pronounced than in the emmetropic eye. The lens, however, varies little in size and, therefore, these eyes may have the narrow anterior chamber.
In which cases is refractive surgery performed?
In people with refractive defects who want to reduce dependence on glasses or contact lenses. The ophthalmologist will be in charge of determining if the patient is a candidate or not to undergo refractive surgery with either laser or intraocular lens and in this case select the most appropriate technique, taking into account aspects such as eye characteristics, age , personal preferences or profession
What is laser refractive surgery?
La operación it consists in the modification of the shape of the cornea to change the refractive power of the cornea and its influence on the total graduation of the eye. For this, laser is applied directly (PRK) or a thin layer of corneal tissue is carefully separated, to subsequently apply the excimer laser that models the cornea to correct the desired diopters. Finally, the treated area is covered without the need for points, to restore the normal ocular surface (LASIK).
This treatment is completely painless. The patient will only notice the application of a beam of light in his eye. The duration of treatment for each eye is approximately 10 minutes. It is an outpatient technique, which allows the patient to leave the Center just half an hour after having performed the intervention, without the need for hospitalization.
Indications after laser refractive surgery
The intervention lasts about five minutes and, in general, it is performed with topical anesthesia (drops), so it is not necessary to cover the eye at the end of the operation and the patient can see with him when he leaves the operating room although with lack of sharpness to the beginning. However, that day it is convenient that you rest and stay as long as possible with your eyes closed, in a low-light environment, in addition to applying the topical medications indicated by the ophthalmologist.