What Is Ametropia? And How Is It Treated? - All About Vision
2021年10月12日 · Ametropia is the medical term for the presence of refractive error in the eyes. It occurs when the eye is not able to focus light rays from an object directly onto the retina to provide a clear image. Ametropia includes refractive …
弱视是一种怎样的体验？ - 知乎
弱视（amblyopia）是由视觉发育期内由于异常视觉经验（单眼斜视、屈光参差、高度屈光不正以及形觉剥夺）引起的单眼或双眼最佳矫正视力下降，眼部检查无器质性改变。 研究结果表明弱视是双眼异常相互作用或形觉剥夺引起的。 弱视主要是中心视力缺陷，动物实验和临床婴幼儿的研究表明，在视觉发育关键期易发生弱视。 三岁以后出现的光学离焦形成弱视的风险明显降低。 弱视眼的最佳矫正视力减退经适当的治疗是可逆的。 研究表明单眼弱视的好眼也有轻度异常，所以 …
Emmetropia & Ametropia: What Is the Difference? – NVISION
2022年12月11日 · Emmetropia is a term that refers to the condition of having “normal” 20/20 vision, with eyes free of refractive errors. Ametropia refers to the broad condition of having …
What is Ametropia? - News-Medical.net
2019年5月21日 · Ametropia refers to a group of visual disorders caused by errors in the refractive power of the eye. In a normal eye (emmetropic eye), light rays focus directly on the retina, whereas in ametropia,...
Spectacle Correction of Ametropias - StatPearls - NCBI Bookshelf
2023年5月11日 · Ametropia refers to any refractive condition that results in the image of an object not correctly focused on the retina. Spectacles lenses are the most common devices used in the correction of ametropias. Spectacle lenses consist of a frame that carries the corrective ophthalmic lenses.
Ametropia Definition & Meaning - Merriam-Webster
The meaning of AMETROPIA is an abnormal refractive condition (such as myopia, hyperopia, or astigmatism) of the eye in which images fail to focus upon the retina.
Amblyopia: Detection and Treatment | AAFP
2019年12月15日 · Amblyopia is the leading cause of monocular vision loss in children. Early recognition and treatment are important to prevent vision loss. The U.S. Preventive Services Task Force recommends...
Ametropias | Institut de la vision
Ametropia is the result of a geometric imperfection in the eye, which causes light beams to fail to converge on the retina. This visual disorder causes myopia, hypermetropia, astigmatism and presbyopia. What is ametropia? Usually, the image of an object observed by the eye focuses on the retina, which creates a sharp image.
Ametropia: Definition - SpringerLink
2018年1月1日 · An eye is defined as ametropic if its far point does not lie at infinity. An (infinitely) far object point is then no longer imaged as a point on the retina. If the cornea and the crystalline lens have spherical surfaces, identical optical conditions are present in all meridian planes, and the eye is spherically ametropic.
Ametropia | Myopia, Hypermetropia, Astigmatism | Geeky Medics
2021年5月23日 · Ametropia: umbrella term for visual disorders due to abnormal refractive power of the eye, which results in blurred vision. Main components of refraction: cornea (two-thirds of refraction), lens (one-third), axial length. Normal state is known as emmetropia, where light is focussed directly onto the retina.