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 · Síntomas. La presbicia se manifiesta de forma gradual. Es posible que después de los 40 años notes los siguientes signos y síntomas por primera vez:
Lazy eye (amblyopia) - Symptoms & causes - Mayo Clinic
2021年8月14日 · Lazy eye develops because of abnormal visual experience early in life that changes the nerve pathways between a thin layer of tissue (retina) at the back of the eye and the brain.
Presbyopia - Mayo Clinic
With normal vision, an image is sharply focused onto the retina (top image). If you have presbyopia, your inflexible lens doesn't adjust to focus light properly, so the point of focus falls behind the retina (bottom image). This makes close-up objects appear blurry.
Farsightedness - Symptoms and causes - Mayo Clinic
2020年6月16日 · Overview. Farsightedness (hyperopia) is a common vision condition in which you can see distant objects clearly, but objects nearby may be blurry.
Nearsightedness - Symptoms and causes - Mayo Clinic
2024年4月19日 · Nearsightedness is a common vision condition in which close objects look clear but far objects look blurry. The medical term for nearsightedness is myopia.
Osteoporosis - Symptoms and causes - Mayo Clinic
2024年2月24日 · Overview. Osteoporosis causes bones to become weak and brittle — so brittle that a fall or even mild stresses such as bending over or coughing can cause a break.
Ear infection (middle ear) - Symptoms & causes - Mayo Clinic
2021年6月23日 · The middle ear has three small bones — the hammer, or malleus; the anvil, or incus; and the stirrup, or stapes. The eardrum keeps the bones away from the outer ear.
Glaucoma - Symptoms and causes - Mayo Clinic
2024年11月5日 · Glaucoma is an eye condition that damages the optic nerve. This damage can lead to vision loss or blindness. The optic nerve sends visual information from your eye to the brain and is vital for good vision.