Presbyopia usually occurs beginning at around age 40, when people experience blurred near vision when reading, sewing or working at the computer.
You can't escape presbyopia, even if you've never had a vision problem before. Even people who are nearsighted will notice that their near vision blurs when they wear their usual eyeglasses or contact lenses to correct distance vision.
Presbyopia is caused by an age-related process. This differs from astigmatism, nearsightedness and farsightedness, which are related to the shape of the eyeball and are caused by genetic and environmental factors. Presbyopia generally is believed to stem from a gradual thickening and loss of flexibility of the natural lens inside your eye.
These age-related changes occur within the proteins in the lens, making the lens harder and less elastic over time. Age-related changes also take place in the muscle fibers surrounding the lens. With less elasticity, the eye has a harder time focusing up close. Other, less popular theories exist as well.
Eyeglasses with bifocal or progressive addition lenses (PALs) are the most common correction for presbyopia. Bifocal means two points of focus: the main part of the spectacle lens contains a prescription for distance vision, while the lower portion of the lens holds the stronger near prescription for close work.
Symptoms of presbyopia result in the inability to focus on objects close at hand.
Presbyopia cannot be cured, but individuals can compensate for it by wearing reading, bifocal, or trifocal eyeglasses.
Presbyopia is officially diagnosed during an eye examination conducted by eye specialists, such as optometrists or ophthalmologists.
Newer types of surgery are being done now to correct presbyopia . Long term complications will be known only after many years. Presbyopia is simple ageing process which requires glasses. If you need more details, go to search ' surgical treatment of presbyopia'.
Presbyopia
Presbyopia
presbyopia
decreasing the flexibility of the lens with age
are conditions where a person cannot see distinctly and comfortably. There are three common eye defects, and they are(i) myopia or near-sightedness, (ii) Hypermetropia or far-sightedness, and (iii) Presbyopia. These defects are corrected by the use of suitable spherical lenses.
Presbyopia
Presbyopia is the inability to see close objects and is a result of aging due to age related changes in the lens and the muscles of the eyes. Consult with doctors online for getting an eye exam.
Answer #1:presbyopia======================Answer #2:The clouding of the lens of the eye, either with age or in response to certainexternal influences, is called 'cataract'."Presbyopia" is the progressive loss of the ability to focus on nearby objects.