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Presbyopia Paris Lasik
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Presbyopia

The presbyopia

Presbyopia is defined as the progressive loss of accommodation, the latter being the ability of the human eye to focus on nearby objects. This is an age-related refractive error, usually beginning in one’s forties and stabilizing around 60 years old.

 

Presbyopia

The presbyopia

Presbyopia is defined as the progressive loss of accommodation, the latter being the ability of the human eye to focus on nearby objects. This is an age-related refractive error, usually beginning in one’s forties and stabilizing around 60 years old.

 

What is accommodation ?

The "autofocus" role of the crystalline lens enables the accommodation, that is, the automatic focusing of the eye on nearby objects.

 

While reading or engaging in other activities requiring a near vision, the crystalline lens will deform itself owing to the action of the ciliary body, a circumferential muscle tissue to which it is connected by an infinity of small fibrils. These tiny fibers called "zonule" surround the equator of the lens in a 360-degree fashion. Upon the contraction of the ciliary body, zonule release their traction on the periphery of the crystalline lens. Due to its elasticity, the crystalline lens thus deforms itself and increases its refractive power. This allows us to automatically refocus the images on the retina without feeling it, in order to get a clear near vision. However, when one reaches 45 years old, the elasticity of the lens gradually begins to decrease.

 

The decreasing and subsequent disappearance of accommodation characterizes presbyopia. It is a complex evolutionary process that is corrected by wearing either half-moon, bifocal or progressive glasses.

At the age of presbyopia, only people with moderate myopia may continue to read up close without accommodation, provided they do not wear corrective lenses.

What is accommodation ?

The "autofocus" role of the crystalline lens enables the accommodation, that is, the automatic focusing of the eye on nearby objects.

 

While reading or engaging in other activities requiring a near vision, the crystalline lens will deform itself owing to the action of the ciliary body, a circumferential muscle tissue to which it is connected by an infinity of small fibrils. These tiny fibers called "zonule" surround the equator of the lens in a 360-degree fashion. Upon the contraction of the ciliary body, zonule release their traction on the periphery of the crystalline lens. Due to its elasticity, the crystalline lens thus deforms itself and increases its refractive power. This allows us to automatically refocus the images on the retina without feeling it, in order to get a clear near vision. However, when one reaches 45 years old, the elasticity of the lens gradually begins to decrease.

 

The decreasing and subsequent disappearance of accommodation characterizes presbyopia. It is a complex evolutionary process that is corrected by wearing either half-moon, bifocal or progressive glasses.

At the age of presbyopia, only people with moderate myopia may continue to read up close without accommodation, provided they do not wear corrective lenses.

WEARING GLASSES AND/OR CONTACT LENSES IS NOT ANYMORE A FATALITY


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YOU ARE SUFFERING
FROM MYOPIA

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YOU ARE SUFFERING
FROM HYPEROPIA

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YOU ARE SUFFERING
FROM PRESBYOPIA

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YOU ARE SUFFERING
FROM ASTIGMATISM

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