Presbyopia - Symptoms and causes - Mayo Clinic
2021年11月20日 · Presbyopia is the gradual loss of your eyes' ability to focus on nearby objects. It's a natural, often annoying part of aging. Presbyopia usually becomes noticeable in your early to mid-40s and continues to worsen until around age 65.
Presbyopia - Diagnosis and treatment - Mayo Clinic
2021年11月20日 · Presbyopia is diagnosed by a basic eye exam, which includes a refraction assessment and an eye health exam. A refraction assessment determines if you have nearsightedness or farsightedness, astigmatism, or presbyopia.
Presbicia - Síntomas y causas - Mayo Clinic
2021年11月20日 · Cuando miras algo que está cerca, el músculo se contrae, lo que permite que el cristalino, que es relativamente elástico, se curve y cambie su capacidad de enfoque. La presbicia es causada por un endurecimiento del cristalino del ojo, que sucede con el …
Nearsightedness - Symptoms and causes - Mayo Clinic
2024年4月19日 · Nearsightedness is a refractive error. This problem happens when the shape or condition of the cornea — or the shape of the eye itself — causes an inaccurate focusing of the light passing into the eye. Nearsightedness usually results when the eye is too long or oval-shaped rather than round.
LASIK surgery: Is it right for you? - Mayo Clinic
2023年6月27日 · You have age-related eye changes that affect your ability to focus up close, called presbyopia. You actively participate in contact sports. If you regularly receive blows to the face and eyes, such as during martial arts or boxing, LASIK surgery may not be a …
Farsightedness - Symptoms and causes - Mayo Clinic
2020年6月16日 · Farsightedness (hyperopia) is a common vision condition in which you can see distant objects clearly, but objects nearby may be blurry. The degree of your farsightedness influences your focusing ability.
Dry macular degeneration - Symptoms and causes - Mayo Clinic
2022年11月23日 · Dry macular degeneration may start in one eye before developing in the other eye. It also may develop in both eyes at the same time. Over time, vision may worsen and affect the ability to do things, such as read, drive and recognize faces. But having dry macular degeneration doesn't mean you'll lose all your sight.
Astigmatism - Symptoms & causes - Mayo Clinic
2021年10月5日 · Astigmatism (uh-STIG-muh-tiz-um) is a common and generally treatable imperfection in the curvature of the eye that causes blurred distance and near vision. Astigmatism occurs when either the front surface of the eye (cornea) or the lens inside the eye has mismatched curves.
Retinal diseases - Symptoms and causes - Mayo Clinic
2024年3月8日 · Retinal diseases can affect any part of your retina, a thin layer of tissue on the inside back wall of the eye. The retina contains millions of light-sensitive cells, called rods and cones, and other nerve cells that receive and organize visual information.
Symptom Checker - Mayo Clinic
Find possible causes of symptoms in children and adults. See our Symptom Checker.