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Unable to see clearly distant objects and yet close objects are well focussed.
Cause
Either too much focussing power by cornea or too long an axial length of the eye (or combination of both) resulting in the image being focussed in front of the retina.
Correction
The placement of a negative concave lens (spectacle or contact lens) in front of the eye to diverge the light rays before being focused onto the retina.
In progressive myopia (fast changing) there are specialist progressive lenses to slow down the rate of change
Recommended lenses are high index with Anti Reflection lenses and of course contact lenses work very well especially GP lenses to slow down progression.
Onset & Progression
Because we are normally long sighted at birth the development of the eye is to become less long sighted or more short-sighted. Those who are at birth less long sighted will therefore become short sighted throughout their early development. Some will show a gradual increase but others especially from the Orient will show rapid increases. Studies have shown that the early correction of myopia will reduce the eventual increase. The Oriental progression has now been explained in the main by a lack of excercise and lifestyle outside, too much close reading activity which has been heightened by the use of smart phones, tablets and PCs.
