What is Astigmatism?
Astigmatism is an heart consideration characterized by imperfection in the eye ’s curve . astigmia is a plebeian and mild condition and it usually can be treat easily . Astigmatism causes blurriness of the vision .
When the anterior surface of the oculus , i.e. the cornea , has a mild difference in the curve in one space from the other , then it results in astigmatism . The corneal surface is supposed to be even and smooth in all directions . If the corneal surface becomes flat or steep in some places , then it results in astigmatism which causes blurred visual sensation in all directions . Astigmatism is usually inborn in nature and can be present in a combination withfarsightednessornearsightedness . In majority of the cases , it is not serious enough to warrant discussion ; however , when this term build up then discussion comprises of corrective lens and surgery .
Causes and Types of Astigmatism
There are two region in the eye , cornea and lens , which aid in focalise on persona . In a normal , healthy eye , both these focusing features have a wholly legato curve . However , if the cornea or lens is n’t curved evenly and swimmingly , then the lighter ray do not get refract right result in a refractile error . astigmia is a type of refractive computer error where the cornea or lens is curved more steeply in one place than another . If the cornea is deform in shape , then it is known as corneal astigmia . If the lens is distort , then it is sleep with as lenticular astigmatism . Both these types of astigmatism make blurred sight which may be in many focusing , such as erect , horizontal , or sloped .
Other refractile error which can occur in combination with astigmatism are :
astigmia is often a congenital condition , i.e. , it may be present from nascence . Astigmatism can also produce after an hurt or trauma to the eye or any disease or surgical operation to the eye . astigmia is n’t caused or worsened if :
Symptoms of Astigmatism
Investigations for Astigmatism
Treatment for Astigmatism
The principal aim of care for astigmatism is to chastise the uneven curvature of the cornea , which is causing the muzzy vision . Treatment options admit disciplinary lenses and refractive surgery .
Corrective lenses for Astigmatism:
Corrective lenses can be worn to address astigmatism . They right the astigmatism by counteracting the uneven curvature of the cornea . The different type of corrective lens are :
Refractive Surgery for Astigmatism:
This handling method for sort out astigmia does so by remold the optic ’s surface . deflective surgery option admit :
