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A person suffering of myopia cannot clearly see objects located in the distance (far away).

Myopia is a trouble of vision caused by a too powerful or too short eye.

This visual defect is compensated by negative lenses. The effect of the lenses is to reduce the power of the occular system and thus to reposition the image on the retina.

Myopia

The eye

All you always wanted to know...

Myopic eye ( above) and corrected eye 

Hypermétropia

Hypermétropia is caracteristic of a too weak eye.  Making use of positive lenses compensates this lack of power and reposition the image on the retina. Altough often associated with a blurr in close-up vision, hypermetropia can genarate visual tiredness, prickling of the eye and headaches.

Hypermétropic eye (above) and corrected eye

Astygmatism

Presbyopia

Presbyopia is a condition that renders difficult focusing for reading or precision work. It is not an illness but rather the result of aging of the eye and more particularly of the lens.  This usually occurs around the age of 40.

Astygmatism is an optical defect caused by malformation of the cornea. The light rays penetrating the eye are curved unequally leading to a distorted blurred image on the retina.  This defect blurs the details in farsight as well as at close range.  It makes reading difficult and hinders precision tasks (Computer, driving, ...).

A sickness of the central part of the retina called Macula.

This can appear as soon as reaching 50 years old. It is characterised by distorsions and apparition of black spots (scotomes) in the field of vision.  It can take two forms: humid or dry.

This pathology calls for an ophtalmic follow-up in addition to an appropriate specific visual equipement (filtres, magnifying glasses or lenses,etc...)

Degenerating macula syndrome due to age