emmetropia

名词 emmetropia:

1. (ophthalmology) the normal refractive condition of the eye in which there is clear focus of light on the retina

em.me.tro.pi.a

n.（名词）
The condition of the normal eye when parallel rays are focused exactly on the retina and vision is perfect.
屈光正常：当平行光线恰好聚焦于视网膜并形成清晰视觉时正常眼睛的状态

来源：
Greek emmetros [well-proportioned, fitting] en [in] * see en- 2 metron [measure] * see meter 2
希腊语 emmetros [比例合适的，适合的] en [在…里] *参见 en-2 metron [测量] *参见 meter2
-opia
-opia

【引伸】
em.metrop.ic