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 · La presbicia es la pérdida gradual de la capacidad de los ojos para enfocar objetos cercanos. Es una parte natural y a veces molesta del envejecimiento. Por lo general, la presbicia empieza a notarse entre los 40 y 45 años y continúa empeorando hasta alrededor de …
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.
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. People with severe farsightedness may be able to clearly see only objects a great distance away, while those with mild farsightedness may be ...
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 …
Cataracts - Symptoms and causes - Mayo Clinic
Symptoms. Symptoms of cataracts include: Clouded, blurred or dim vision. Trouble seeing at night. Sensitivity to light and glare. Need for brighter light for reading and other activities. Seeing "halos" around lights. Frequent changes in eyeglass or contact lens prescription. Fading or yellowing of colors.
Hearing loss - Symptoms and causes - Mayo Clinic
2023年3月30日 · Hearing loss that comes on little by little as you age, also known as presbycusis, is common. More than half the people in the United States older than age 75 have some age-related hearing loss. There are three types of hearing …
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 · The retina contains millions of light-sensitive cells, called rods and cones, and other nerve cells that receive and organize visual information. The retina sends this information to the brain through the optic nerve, enabling you to see. …