What is Refractive error and type of refractive error ?

Emmetropia


When parallel ray of light coming from infinity and focus no the retina when accommodation at rest is called as emmetropic .


Ametropia or it is also called as refractive error, when parallel rays of light not focused on the retina it's either in front, behind such condition called as ametopia.

History taking of eye hindi video

Myopia


When parallel ray of light coming from infinity and focus in front of retina when accommodation at rest is called as myopia.


Hypermetropia


When parallel ray of light coming from infinity and focus in behind the retina when accommodation at rest is called as hypermetropia .

Astigmatism


When parralel ray of light coming from infinity and focus in line not in point is called as astigmatism.

Presbyopia


It is condition of refractive error in which patient unable to read near letters it's due to the loss of accommodation , it's starting from the age of 40 years.

जानीए क्या होता है काला मोतीया ?

Previous Post Next Post
//disable Text Selection and Copying