Myopia is a refractive defect that occurs because the image of an object that we are looking at is far is focused in front of the retina, with relaxed accommodation.
This is because the eye has too much power. Normally, this is because the lens has an axial length too long. The curvature of the cornea is usually stable after 6 years.
When we are born, most babies are hyperopics. Myopia is usually seen after 9 years and during adolescence. Subsequently, when cataracts develop in a more advanced age, it can also develop.
Typical symptoms are blurred vision at distance. Usually it is not present with headache, or weariness of the eyes.
The usual choice is glasses or contact lenses in order to see clearly.
Myopia may be classified in: