cataract
an opacity of the lens of in eye is called cataract
types
{congenital cataract }
this cataract is present since birth in occur in small baby
{senile cataract }
in occur in old age for exampal 40 50 year
{acquired cataract }
this cataract occur during life
{ complicated cataract }
it occur due to another ocular disease
{secondary cataract }
it is a recurrences of cataract after operation
causes
}malnutrition espicially of vitaman {D}
}viral infection
}hypoxia e gin ante partum hemorrhage {APH}
}trauma to eye lens
}diabetes mellitus {DM}
}lenticular metabolic eye disease
}old age
clinical feature
}it may be symptomless if present of periphery
}if its small
}it can cause visual impairment if present centrally
}it can cause visual impairment if it is a large
}there is white pupillary reflux
}progressive dimness of vision
}even vision is reduced to count fingers
}opacity can be seen through opthalmoscopy
}day blindness more than night
}halo around light
}lens appear brown dark brown black
}no pain in eye
}no redness in eye
treatment
}examine the patient carefully
}it cataract is suspected refer to opthalmologist
}it may no need treatment if vision if not imparinig
}atropine eye drop dilates pupils to improve vision
}iredectomy may improve vision
}replacement of whole lens by lensectomy
}complete bed rest after operation
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