Are Essilor lenses good for bifocals?
AGE SENSITIVITY (PRESBYOPIA)
What is presbyopia?
Presbyopia is the technical term for age-related farsightedness. From around the age of 40, people slowly lose the ability to see objects in close focus. Because like the body in general, the eye is increasingly losing flexibility. It deforms and can no longer focus the incident light directly on the retina.
Signs and symptomstome
These symptoms indicate presbyopia:
- Blurred vision, especially of nearby objects
- Poor vision in poor lighting conditions or when you are tired
- "Long arms" - keeping objects at a distance
- a headache
- Tired, strained eyes
What causes old ageimperfection?
Part of the aging process in humans is that the lenses of their eyes and the muscles around them become weaker. As a result, incident light is no longer focused on the retina, but behind it. This makes it increasingly difficult for the eye to see objects clearly at different distances.
This is how die lens
The lens bundles the light evenly and focuses it on the retina.
In order to be able to see objects clearly at different distances, it can change its shape: for objects in the distance it flattens out, for objects in the vicinity it becomes rounder. She is helped by a muscle that surrounds her. In the case of presbyopia, its flexibility has already decreased, and the lens can focus more difficultly when looking at close range.
How is presbyopiafound it?
Presbyopia can be diagnosed at any eye exam. To do this, the ophthalmologist checks the health of the eye and then carries out an eye test. By the way, you can do this approx. 30-minute test at an optician's at any time. The expert checks distance, near and intermediate vision as well as visual acuity. The visual check includes the so-called Snellen diagram with its decreasing letters. Those who already wear visual aids can also be tested with glasses or contact lenses. Opticians also carry out a number of other modern tests - e.g. B. on visual behavior and head movements.
How is old age securityactivity treated?
Since presbyopia is caused by the lens and not the cornea, laser treatment is usually not useful. The ametropia is usually compensated for by glasses with corrective lenses. They direct the light directly onto the retina again and thus help the eye to see clearly. Prescription lenses for presbyopia are usually convex in shape, thicker in the center and thinner towards the edge.
Presbyopia affects practically everyone and usually gets worse with age. It is all the more important to have your eyes checked regularly and to adapt your glasses to your changing visual needs. So it can make sense later to wear bifocal or varifocal glasses that enable sharp vision at all distances.
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