markdownabstract__Abstract__ Myopia (nearsightedness) is a highly common eye condition that is predominantly caused by an axial elongation of the eye. Myopia can usually be corrected with negative glasses, contact lenses, and/or laser re... VJM Verhoeven 被引量: 0发表: 2014年 Myopia (near...
What type of lens is used to correct nearsightedness? A. Convex lens B. Concave lens C. Plane mirror D. Prism 相关知识点: 试题来源: 解析 B。解析:近视是由于眼睛的晶状体对光线的会聚能力太强,需要用凹透镜来矫正。选项 A 凸透镜用于矫正远视眼;选项 C 平面镜主要用于反射;选项 D 棱镜用于光...
causedmanylanguagestodisappear,anddominantlanguagessuchasEnglish,SpanishandChinese areincreasinglytakingover. Atpresent,theworldhasabout6,800languages.Thedistributionoftheselanguagesis hugelyuneven.Thegeneralruleisthatmildzoneshaverelativelyfewlanguages,oftenspokenby manypeople,whilehot,wetzoneshavelots,oftenspokenbysma...
Farsightedness, also referred to as “hyperopia” by eye doctors, is the common term describing eyesight that is blurry on objects that are nearby, but clear when you look at anything in the distance. So, watching TV may be a problem, but reading a highway billboard probably isn’t. ...
Hyperopia vs. Myopia (Farsighted vs. Nearsighted) Myopia could be thought of as the opposite of hyperopia. People with myopia can see clearly close up but things at a distance are blurry. Myopia is also caused by the way your cornea or lens focuses light. In this case, light entering ...
Farsightedness is the result of an eyeball that is too short or a cornea with too little curve, and light projects behind the retina instead of on it. Myopia vs. astigmatism –Astigmatism is another type of blurry vision caused by an irregular eye structure. In the case of astigmatism, ...
Kolata, Gina
Read our helpful guide on presbyopia, how the condition is caused, which signs and symptoms to look out for and how you should treat it.
Read our helpful guide on hyperopia, how the condition is caused, which signs and symptoms to look out for and how you should treat it
Blurred vision is normally caused by refractive errors. This includes farsightedness, astigmatism and nearsightedness. It can also be a symptom of a more serious condition such as eye disease and neurological disorders. While the condition can affect both eyes, it mostly occurs in one. Blurry ...